1. UI design problem, easily fixable
2. Not sure how this is undoable with gamepad
3. This is actually a problem that would require more things, but going through raid frames with gamepad is doable but obv cumbersome
4. WoW is already a tab-target game, so doable
I do agree that WoW would need quite a lot of stuff changed to work properly on gamepad, but not impossible. Easiest would be to just have it separately, not cross-play, but that's stupid. BUT since WoW is an ancient game, I don't think it will ever be done because of potentially not ever paying back the investment.