I will actually miss WoD, never really understood the hate to it. Sure there was little content at times, but that's what the unsub button is for, just unsub when you find the game boring, and resub when you want to play again, as you do with every other game - play when fun, play something else when you find it boring.
The raids where amazing to be honest, Garrisons had potential, but they put too much into them, making gathering professions obsolute, and everything a bit too easy. Free gold is great though, as that equals free game time.
I also really loved the leveling in WoD, leveled up a bunch of alts, which I never do because I HATE questing, but WoD was amazing.
Legion will be better though, atleast that's the feel I got from playing on Beta. There is always something to do! But I give it two months before people start to bitch about "too many world quests we HAVE to do", or that the grind in Suramar is too much. Or that Artifact Weapons and Power is stupid, as you have to play too much to keep up with everyone else.