That’s why WoW keeps stealing things from XIV, right?
But seriously, they could’ve stolen ANYTHING, like player/guild housing, commendation systems for LFG, or the deep and involved crafting systems that make crafting and gathering actually worthwhile.
What did they steal? Linear main story quests and the AoE cap.
WoW isn’t dying, no, but it may be smothering itself by doing everything in its power to encourage token sales instead of actually making it a good game: