^^^ This - WoD and the Garrison playstyle erased loads of casual/social/family guilds from WoW. About 6 months in, it was like someone just flipped a switch. Once those people left they never came back. People talk about Pathfinder and the way Blizzard botched flying. That was part of it, but the solo play Garrison did far more damage. In my opinion.
My take (from a prior thread): Is WoW out of touch with it's core audience? - #89 by Kholin-drakthul