I don't really see where all the problems are. If you look down I obviously have 4 level 90 characters and I enjoyed leveling all of them. I still need to do 2 of them through Townlong and Dread Wastes for Gold. I also have 3 other 85s and 3 classes I'm working on still in Vanilla zones. I don't see the real problem, in Cata I hated it, because the initial quests in Hyjal were hard as crap with bad gear and Vash'jir is the pretties zone they have ever created, but is horrible to do more than twice. I can go from 85-90 in 2 days if I don't have much going on, probably averaging 5-6 hours a level.