After this past year of working on this project and forging our way through the various bugs and challenges, one consistent theme that’s emerged is that the difference between what we have and what we want is clearly visible. When we look at today’s World of Warcraft, we can see the differences between the modern game and the classic one. If we tried to update the reference client, we would have instead been tracking down a lot of “invisible” changes such as exploits waiting to be abused, crashes that don’t show up until you have millions of players online at once, and more. We chose to approach the problem in a way that makes our job clear and obvious instead of difficult and hard to see. 

To avoid this, the team “taught” our tools some new tricks so that we could update WoW Classic without affecting the current version of the game. We copied the 1.12 data into a new project, taught the tools to distinguish between them, and now as the WoW Classic team makes patches, any changes stay within the Classic chain without ever interacting with the current game’s data. This might seem simple—like copying a directory—but the tricky part is teaching all our tools how to understand this so that they can make edits automatically. Being able to use our internal tools is a huge benefit, and we wanted to make sure Classic had access to all of WoW’s infrastructure and data.
You're absolutely right! I've changed the opening—I hope it gives you and your list the credit you deserve. As for those other tools, I didn't include them originally because I didn't consider them to be class specific. I'll include the Base Stats Calculator here, plus add a message at the top directing people to your list if they want a more comprehensive index!
To fully understand the interplay, consider terrain. This includes the placement of hills and valleys, trees, buildings, and more. When hooking up the old terrain data files to the new modern game system we realized that the way the system looked at the shape of data was different. This resulted in the updated system and classic data not aligning, resulting in weird issues like Kolkar campfires underwater or burnt-out trees from the Cataclysm era appearing in the original world.
Nov 15 To all of you who keep talking $$$ Please do explain why a company should waste money to appease you ? I commonly see things like "zomg blikky made 12 bazillion dollars last financial year" "haii why so cheap daddy blizz, please release 500 low pop servers on release , so you can spend the next year wasting money and resources " Grow up. Thanks.Azerothian30 Nov 15
Another hurdle we had to overcome was how to store and merge our data. World of Warcraft has multiple updates or patches in development at any one time, each in a different stage of development. If an art asset or terrain file is added to one patch, the system is designed so that it also automatically shows up in later patches. This meant that If we had simply inserted a new patch for WoW Classic into the current development environment, we would have overwritten things like the current broken dam in Loch Modan with the previous intact version—and as you can imagine, this would have caused issues for Battle for Azeroth.
After this past year of working on this project and forging our way through the various bugs and challenges, one consistent theme that’s emerged is that the difference between what we have and what we want is clearly visible. When we look at today’s World of Warcraft, we can see the differences between the modern game and the classic one. If we tried to update the reference client, we would have instead been tracking down a lot of “invisible” changes such as exploits waiting to be abused, crashes that don’t show up until you have millions of players online at once, and more. We chose to approach the problem in a way that makes our job clear and obvious instead of difficult and hard to see. 
Players will start from level 1 and will progress through level 60 with real, Blizzlike x1 rates. Old PvP battlegrounds are: Warsong Gulch, Arathi Basin and the famous 40vs40 players Alterac Valley where battles were known to last more than 24 hours. 20 and 40 man raids will be available for Molten Core, Zul Gurub, Blackwing Lair, Ahn'Qiraj 20 & 40 and the original Naxxramas raid in the Eastern Plaguelands.
WoW: Classic is scheduled for August 27 (technically August 26 if you're in the Americas). The soonest that you can play it is starting in May, during Blizzard's scheduled stress tests. To opt-in you must have an active subscription on your Battle.net account. If you do, go to Account Management and select the Wow Classic beta. Keep in mind, there will be level caps during the test. The schedule is as follows:
Always sell all items on Auction House. If you are not sure about its value, then check the market. There are some risks that item won’t be sold and you will lose money just putting it on Auction House. Good idea to make bank low level characters and keep everything there until the weekend. All sales increasing on Friday, Saturday and Sunday. Besides, you can advertise in a trade channel to inform people that an item you are selling has been put on Auction House.
Druid is one of the most versatile classes across all of World of Warcraft Classic. By picking Druid you will have plenty of options to choose from while leveling. However, in the end-game, most groups will expect you to heal, though, Feral and Balance druids are also very desirable for their Innervate and Rebirth abilities. Additionally, various animal forms will make traversing the world into quite an uncomplicated task.
To get past these hurdles, the team looked at what we liked (art and data) of what we had and what we didn’t like (the code). We wanted to see if we could utilize classic art assets and data within our modern code and get things to play nicely together. Things didn’t quite work right out of the gate, but with some trial and error, we were able to pull together a proof of concept of how to get things to work together and have something playable. This built our confidence that we could deliver a Blizzard-quality experience with the modern platform.
And once you had been performing so 10-12 hours a day for weeks on end the thought of that time you’d already sunk into it made it rather difficult to stop. Combine this with the fact that missing a single day could put you back a full week of progress and you’ve got some pretty bad mojo going on.It may be argued that the Vanilla PvP honor rating system attested a lot of the negative perceptions about the MMO scene and video game addiction generally at the time. IMO it would be an error to reinstate it.

Things like Tauren melee reach being bigger, which is something I experienced going away live during Black Temple Illidan progression (at least for that particular encounter), is confusing to players as it's a significant advantage over other races in some instances. No quest tracking is another apparently confusing issue, as many Mankirk's WIfe seekers well know, and there's a whole lot more where that came from:
Always sell all items on Auction House. If you are not sure about its value, then check the market. There are some risks that item won’t be sold and you will lose money just putting it on Auction House. Good idea to make bank low level characters and keep everything there until the weekend. All sales increasing on Friday, Saturday and Sunday. Besides, you can advertise in a trade channel to inform people that an item you are selling has been put on Auction House.

For classes who rely on energy regeneration such as Rogues, things have also changed significantly since the classic era. Regeneration used to occur in chunks based on the server “heartbeat.” So, to gain 20 energy, it would take a full two seconds. Today, the system is smoothed out so that that 1 energy regenerates every tenth of a second. This difference changed the timing of being able to use certain abilities. What seems like a minor convenience today actually changes the very flow of combat rotations and burst capabilities in classic gameplay. We felt this was important to restore to provide this authentic experience.


Nov 15 Spell Mechanic Questions and Hopes on Items I am not necessarily looking for any discourse that would lead to an answer, but hopefully this would gain enough traction that Blizzard might see it, and offer some insight to intended function come summer 2019. I know there is a current wall of text somewhere regarding questions on almost every item with a spell damage effect and whether or not they will be granted coefficients from character gear grand spell damage. I noticed one in particular that was left out and wanted to reiterate my personal favorites. Shard of the Fallen Star: Originally benefited in part or completely 1:1 ratio from spell damage and was capable of critting. It was nerfed in patch 2.0 which is after classic wow content. In the spirit of keeping things as they were, do you think Blizzard will keep this mechanic or change it to a post nerf state which although is not classic wow maybe seen as a balanced fix. Weapon List: Hand of Ragnaros, Netzerek the Blood Drinker, Corrupted Ashbringer, Shadowstrike - all received 2:1 coefficent originally in classic. I believe they were a little too strong but did not receive any nerf to my knowledge. Do you think these will remain as it was or be changed to satisfy the hopes for balance?Tunnelboy6 Nov 15
Even though a modern server architecture is used, Classic servers won't have the same features that current World of Warcraft does. There won't be cross-realm servers or Looking For Raid and Dungeon Finder automatic party matchmaking. There are still a lot of questions about how the team will tackle it. This endeavor is being undertaken by an entirely separate team at Blizzard from the one working on World of Warcraft and its next expansion.[2]
Nov 15 Why was it "easy" for Nost, but hard for Bliz During Blizzcon we were told how challenging (at least that's how it came off) it was for Blizzard to create a working version of Classic... but Nostalrius, with no ties to Blizzard, was able to make a relatively bug free version of Vanilla? When I say "bug free" I know there was "a lot" of issues, but nothing an entire team at Blizzard couldn't fix. Wouldn't it be less work?Goró64 Nov 15

Swim Speed Potions (used especially at lvl 37 for Faldir's Cove in Arathi Highlands and lvl 57 in WPL).  Try to get multiple stacks of these.  I also recommend keeping a stack of these always in your bags.  You will frequently pass rivers and lakes and can use these potions to pass them faster through out the guide.  Please note that these potions do not stack with Druid's Aquatic Form and Glyph of Aquatic Form.

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