You said a lot of stuff but I really wanted to point something out, the majority of Quality of Life changes were asked for by the community at the time. Not everyone enjoyed running to a dungeon, for example. You make it sound like Blizzard pushed these changes onto people when in fact it was something that many people wanted. I'm not sure why you are talking on behalf of every player during Vanilla, but you are simply wrong.
Again, you would be hard pressed to say that the majority of people who enjoyed Vanilla WoW would return. Look at the numbers themselves. There were what, around 7 million people playing during Vanilla? How many people are playing on every single private Vanilla server? It honestly seems like there aren't that many people left. Would official legacy servers bring them back? Doubtful, if there aren't even that many people playing on free private servers.That loyal fanbase is still here. They are not playing retail. They did not leave.
That's subjective, really. Many classes were gimped, relegated to simply casting one spell during raids and some specs weren't even viable. The talent trees were a mess. Honestly, the Blizzard Devs didn't know what they were doing in Vanilla, and I'm surprised people think stuff like balance was so great at the time. Hell, even itemization was a mess.Balance changes, really? That should be the last line of defense since they are all horrible, compared to Legacy.
Your entire argument seems to be 'I feel it was better before'.Can't say. It's all hearsay, as you decide you should feel emotions, instead of the actual people involved.
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I think you hit the nail on the head, really.