Kaivax, a WoW forum community manager, revealed that WoW Classic's class design, battleground mechanics and stats on existing items will be set to their 1.12 state, despite the game releasing content that expands beyond that. This removes "progressive itemization," so if the stats on a specific piece of equipment was changed during the original updates, that won't take effect in this version.
If you’ve not yet received an invitation, all hope is not lost. Blizzard did announce a number of Stress Tests that they’ll be using in order to “put our servers and technology through their paces in a series of stress tests.” These will “extend the opportunity to even more players. Level caps will also be in place to ensure we’re emphasizing the “stress” in “stress test.”
Zygor's Pets and Mounts guide is a huge in-game bestiary for finding, capturing, and taming the numerous creatures roaming the wilds of Azeroth. Whether you're looking for a loyal companion to join you on your adventures, or a swift steed to get you to and fro, Zygor's Pets and Mounts guide is the ultimate guide to have at your side during your next World of Warcraft safari.
Occasionally it's also been proposed to re-randomize all the gear. We didn't have best in slot lists back then. People weren't starting out as a fresh level 1 character with a complete list of which dungeons to run at 60 in order to gear as quickly and efficiently as possible. Now, all that data is available. If gear were re-randomized then all of those lists would become useless and thing would be close to how they were. Which is a more important part of the "vanilla experience?" the fact that item X from boss Y has exactly Z stats on it, or the voyage of discovery? Personally I think that voyage is way more important. Do you remember how many points of which stat on the ring or whatever that Darkmaster Gandling drops? I don't. Would it kill your experience if the BiS for every class were in a different dungeon so people had to actually play to figure it out rather than simply consult a spreadsheet? I don't think it would. For that matter, it probably wouldn't be a bad idea to handle it intelligently so that the better gear is in later dungeons. I remember there because some weird cases where level 40ish gear was better than anything that dropped in level 60 dungeons.