so far MoP has brought enough worth for what i spent on it.
the quests often had good overall story lines (i actually bothered reading every single one of them). the raids so far are really cool, though i kinda wish it was a bit smaller since 16 bosses in 3 places is quite a lot to do each week.
dailies are a major complaining point, while i myself found them pretty fun to do. though i stopped doing them once i reached exalted too focus on other stuff more also.
5.1 so far as me pretty excited, im rushing as quickly as i can too earn 3k rep so the next part of the story chain gets unlocked (should reach 6k/12k today, looking forward too it)
so yes overall im still really happy about it, and i havent even really tried out the new pet battle mini game which if i may believe my guildies is pretty dam awesome.