I personally don't mind much, because I play this game primarily for Mythic Raiding and little else. Flying is not a thing there anyway.
Other than that, I find excessive dooming about something we seen like whole 5 seconds of footage for to be hilarious.
The mission statement for that feature is pretty clear and in the end one way or another it will allow fast airborne travel over the zone. Whether it will take 3 weeks or 5 months to fully unlock max speed and altitude is of little concern to me.