WoD didn't have any MMO content at all, that's why I left. I was very happy with Wrath, Cata or Panda... I don't want ALL the content behind a queue, it matters if it's enough for me. Leaving the game is not a matter of threat, it's a matter of not having anything to do that's also fun for me. I've come back for the last 3 months and I've only done ironman leveling, no WoD "content" at all. Yes, I have flying, so I've pretty much did everything in the world, but I won't farm apexis and shit forever.
Unfortunately they've destroyed LFR, I barely touched it this expansion. I had a lot of fun in LFR in ToT and SoO, and even the other raids had some fun bosses that used to create countless wipes and rage. It was enough for me.
I can't really join a guild because I play on a EU realm at retarded hours, not many people are online, not to mention raiding. But even so I could find some LFR...
I'm sure I'm a "special case" among the queue fans, most just love the convenience and don't really give a fuck about heroic or mythic. Nowadays to raid mythic you need more energy to find a guild that can do that without going to pieces in the next 2 weeks than you need to actually raid.
Btw, I have never ever played any facebook game, so I can only compare the garrison with a huge steaming shit.