as an alpha tester i can say that in my opinion leveling is the worst ever in wow, but note this is because i despise the forced level scaling of the world, between that and no new talents i see no point in having levels. This is said as a person that generally likes leveling. Also each zone feels disconnected and like a mini-expac / patch in itself to me right now. I think this is due to the level scaling and no good flow between zones like in previous expacs where you got a quest to go to the next zone. In legion its like go to a zone do its quests/story finished... back to the hall pic another zone at random go do the same. I'm sure this great for some people but for me it sucks.