Flying does not add anything interesting to the travel experience unless we can do something with it.
I don't see the point of having flying exclusive content that is simply that way because you can't get there without a flying mount.
And this is coming from a pro-flyer.
My reasons for wanting flying is choice, in that it lets me dedicate time that isn't spent negotiating the ground into other content.
Flying has a lot more potential to be interesting, in offering new mechanics beyond being "easy".