Hm.. how very curious. He's complaining about how he got through all the content and doesn't know what to do anymore after 1,5 years.
I recently resubscribed to WoW, I am now 3 weeks into my subscription and already cancelled it again yesterday. Now the question.. why did I do that? Simple answer: because I'm done.
I lvled my char to 90, equipped him in a couple of days, completed that newly added "farmville" in 2 weeks. Saw all new questhubs, leveled some of them to exalted. I saw all new dungeons and raids, to be fair, only normal mode not heroic, but the story.. I'm through with that. Also made good progress on that legendary quest which can't be completed yet. Even did a bit of PvP and got my professions maxed out.
All of that in 3 weeks. Now I'm bored of that game again. I don't understand why people complain about that, it is freakin normal. Once you're done with a game you either put it aside or just have some fun with your friends. You may wanna put it aside for a while and come back later. I don't understand those guys problems.