I usually quest in prowl mode. Flying is only to get to World Quests and if there is no other option. While I dislike having to wait for steady flight, I also realize that I will probably have it before I want to use it anyway.
However, I don’t see the logic of locking it behind the campaign while Skyriding isn’t. Let people choose how they want to fly from the beginning. Keep the pathfinder and give people some sort of mount for finishing it. Though knowing Blizzard that mount probably won’t be able to fly at all.