Could not tell you it is worth coming back, or if it is not... myself I barely pvp, I do raids on my main, some bosses x2 if we need a fill in, play AH. Solo Dungeons, Isle, which now I am pretty much long done with anyway. Flexi Raids etc.

I still love world of Warcraft, I started playing late Vanilla. Barely ever been unsubbed.
game has changed a hell of alot, and to me, the changes are fine, alot for the better.

And it is what it is, a game, a hobby for some, pass time, adventure. Loads of games out there, I try some now and then for fun, but my heart is still in WoW and enjoy everything I do in the game, with some guildies where my 2 main toon raiders are, or solo with my x5 and do whatever I feel like at the time.

Totally have enjoyed MOP, nice expansion, well I like it anyway :P