I get that. Here is the point I am making... again
I am ok with using my flying mount as a ground mount in 6.0. I am NOT ok with using my flying mount as a ground mount in 6.1 and higher.
If they fail to add the quest in 6.1 to unlock flying in the new zones, I will close up shop and take my extremely thick wallet elsewhere. If I am not going to fly in an MMO, it might as well be in an MMO that ADDs features rather than REMOVING them.