Really? Leveling is in bad state? They are like 6-7 years too late for that.
Leveling has been in ruins since middle of WoTLK, since heirlooms made their appearance and developers in their infinite wisdom decided that leveling was too hard and went through it with massive nerf bat. It was single player experience void of any MMO and RPG aspects since Cataclysm when all handholding and phasing started. Leveling dungeons have been in ruins since they were nerfed and split for LFD crowd. People not being able to finish stories in Cataclysm zones? It was like that since Cataclysm.
At least they finally admit that something is wrong. But it is probably too late - people who were interested in MMO and RPG aspects of game are long gone.