I'm very LttP with MoP. Playing Hearthstone made me want to check out WoW again. I lvld my first 90 last week, a druid (something I always enjoyed playing from vanilla up to wotlk, I've hardly touched cataclysm), but now I feel a lot less excited to play her. It's basically grinding heroics and doing dailies for points to gear up for raiding or if I want to PvP, grind honor to be of any significance (gap seems much larger than I remember). I don't mind grinding, but it just doesn't feel like alot of fun. I remember heroics actually took effort and felt more rewarding, but right now everyone is racing through them (I know this has to do with me being late).
So I'm debating wether I should continue and check out raiding or spend my points on heirlooms and level new characters for the next expansion, so at least I'll be there ready from the start (which could offer what I'm missing right now) with a bigger selection.