Eh, I can't speak for overall populations. My playtime dwindled quite a bit after hitting 80, and some of the guardian changes that came along pretty much neutered my interest in the class. Haven't logged on since phase 2 of the Halloween event, and really haven't even thought about it at all.
I feel that I got my money's worth out of the game, and will drop back in when properly motivated, maybe to level something else up. It's a game that does a lot right, and a good amount not-so-right.