I still play the game and I would say that Legion comes on top by far, even if I have rose tinted glasses for TBC/WotLK. MoP had great features, ToT, TI but there was too much goofiness around pandas - few zones went to 12/10 on beer, carrots or rabbits quests and the beer dungeon will be my most hated dungeon in WoW. Overall I only liked Shado-Pan faction, the other pandas were portrayed way too "dumb" for my taste but at the same time they were "educational" which just pissed me off. They could have pulled off some really strong quest lines and made same great villains (Mogu and The bugs could have been made bigger, but even they were portrayed like textbook dumb cartoon level evil powerhungry blocks of stone/bugs who either acted alone or against each other - I know, I know, it was the point, but it it made me feel like I was fighting a ninja turtles side villain)