I have played Warcraft off and on since 2004 and I’ve never had a problem with casuals or really any group of people in the game.
That changed with WoW Forever and the dungeon XP nerf.
Blizzard took the community and divided it, and then ignored it while players turned on each other.
That by itself is pretty ugly, but the way many casual players have responded is far uglier.
Instead of supporting how other people play the game, or staying out of a conversation that they didnt have a stake in, they have swarmed threads insisting that all players play how they do.
I have yet to see a single one of these people explain how people playing differently actually directly effects them - they universally simply dont want anyone else do be able to play a different way.
The only reason they have put forth is that it will cause them to level too quickly, but there are dozens of methods within their control and without your intervention that they can slow leveling down if they want or need to.
But you have left raiders and dungeon players out to dry, and you have caused a toxic rift in your community that has torn players apart instead of making them excited to be in the world together.
I dont know what to say but shame on you, and probably restore dungeon XP before this goes live and the problem is 100x worse.
You’re screwing your whole game, all versions, FOREVER by reinforcing these attitudes between players.