Start of Cataclysm (first 2-3 months) was the last good time of WoW. MOP isn't even a WoW expansion, noone cares about it. It generated no hype whatsoever, it's about pandas. A story (in this case, game) can only be as good as it's villain. WoW died with the lich king.
Just make the next expansion a WoW expansion, not some panda ponies queer stuff... People that played WoW since 2006 grew up by now, and WoW as it was, was ridiculous enough, no need for this idiocy that is MOP....
But yeah anyway, I hope the 6 million players that will be left playing by the end of the year will enjoy logging in for one day per 6 months just to clear the raid in LFR. What a brilliant idea Blizzard, makes all the work worth it for you I'm sure....