Hello! First of all, I'd like to point out that I fully intend to play and enjoy Classic regardless if changes are made or not. This topic is about how to create the most genuine vanilla experience and wether or not that requires making changes. The changes I talk about are not QoL changes, but rather rebalancing of both classes/bosses and perhaps new contents.
My concerns, personally, is that copying the original game exactly won't give us the real vanilla experience. As far as I know, the original vanilla was about exploring a brave new world. It was about class fantasy and exploration. I fear that as every single little bit of vanilla has been explored, that magic will be gone.
As we already know which classes will suck (for vanilla's whole existence), there won't be any room to explore the classes and choose one depending on which class fantasy you enjoy most. Some classes will just suck at most things, while others will be superior in most things. The same thing is true with world exploration. We already know every mechanic and boss fight. What to bring and what to do. No real challenges or exploring going on.
I think that this could easily be remedied, to give us the real vanilla experience for real again. This could be things like:
*Rebalancing the classes: By making some classes less useless, you'd be able to choose depending on the class fantasy, and not wether or not that class will suck (for the rest of the game's existence). For example, people back then didn't know druids would suck, they could be buffed at any point. Let us have that luxury too. It'd be about making more classes available, not making them great at everything.
*New raid mechanics and balancing: This would have to go along with class rebalancing. Although, I think that this would be for the better. By making small changes in mechanics and balancing, it'd be like rediscovering the raid for the first time again. Entering a raid should feel epic and challenging and should not feel like you're just following a decade old guide, which has been perfected for years. Besides, they could make lack luster bosses more interesting.
*Small visual updates: By improving graphics and the visual experience, it'd be like exploring another game. While the stuff will be familiar, it will still be a new experience. This would help the feeling of exploring a new world.'
*New quests/raids/bgs: This is another thing that would give us the feeling of exploring a new world. I'm not talking about tons of new contents. Perhaps just a few quests between 50-60, a new daily quest hub at 60 etc? Just small incremental changes. Raids and bgs could be those that didn't make the cut the first time. As I said, it doesn't have to be much, just a little is enough to give us a new experience and the feeling of exploring a new world.
I know that this "new" vanilla world would eventually be explored and discovered, just like the original game. But at least we'd get the real vanilla experience again, and not some theme park museum.