I’m not suggesting they remove levels entirely. There are plenty of ways to make a “leveling” system feel rewarding. Star Wars: The Old Republic is a great example, it’s fun, engaging, and every class has an amazing story. WoW could take a page from their book. Adding full voice acting to major storylines for each expansion era would be a huge step in the right direction.
The real issue is that leveling, as it stands, does a poor job of teaching players their class or making the game welcoming for new players.
That said, if your goal is just to speedrun to 80, then it’s in a great state. Four hours of Timewalking, and boom, mission accomplished.