This argument is becoming increasingly absurd.
Is it still vanilla if they don't give 1 player the legendary neck that dropped in MC before removing it from the game? Or is not giving to anyone going to make it not vanilla?
Will it still be vanilla if when AQ opens they make CThun mathematically impossible and don't change it till a guild does the actual math and makes angry posts on the forums?
Is it still vanilla if paladins reckoning bomb isn't still glitched on release and is able to one shot doom lord Kazzak making a focus video on YT?
This argument is infantile and muh feels is not an objective argument for something being good or bad. Vanilla is not authentic only if things happen exactly the way they did, it's about grinds, pain and pleasure and the experience of raising with 40 people, difficulty in getting epics, being challenged by the game.
It will still be vanilla if ubrs is 10 man on release and not 15 man on release like it was before.
Minor QoL changes do not make vanilla not vanilla just like fixing errors back then didn't make vanilla a different game