This Ornyx guy seems really salty and a bit cocky.
I get that we don't get flying right away, but now we had Argus for a lockout and i've seen the lava, mountains/ridges and demons and it feels i've seen it all. Also doubt the last zone will be much different.
Blizzard has a 3 week plan for the opening of Argus, so wait those 3 weeks + one lockout then just give flying back. By then we've seen it all plenty of times while running around on the ground doing the dailies, again.