I really can't say that the leveling quests in MoP were worse then other expansions. I don't think there was one zone, except for a part of Valley of the Four Winds that was as bad as Twilight Highlands! Factor in the change to have entire group loot objects off mobs, it was better then Cata.

My gripe is the dailies that have collections <UGH>. I don't recall a set of dailies that had this amount? I haven't done all of them just thinking the ICC dailies, the Crusader dailies, Fireland dailes, they were all really good compared to Golden Lotus..., each day there are 2 collect x amount of y, that you have to do individually, that's a bummer because I found the TB/Firelands dailies not bad, the Wotlk dailies were pretty M/B friendly (I probably have a short memory :P)