I really hope Blizzard decides to make the 85+ zones a no-fly zone till atleast lvl 90 (or whenever the max level will be) I remember the epic feel each new zone had when you was forced to explore it on ground level. I personally feel this is why the Cataclysm zones felt a little lacklustre to me due to the majority of time flying at a high level. After all one of the most epic feel I had in Wrath was climbing the vast mountain in Howling Fjord