I enjoyed the 85-90 content, that was easily some of the best I've ever experienced in WoW.
The justice point vendors left me scratching my head and wondering why anyone thought that was a good idea and the reputation grind is just not my idea of fun, at least not on multiple characters. I felt like they tried to make alts more appealing in Cata but Mists is not very alt friendly so far (I've no doubt that will change though).