No WoWhead's author confirmed that "no [traditional] flying" was told to them. To back that up, look at Blizzplanet's interview (https://warcraft.blizzplanet.com/blo...-and-tina-wang)
While not saying that "normal" flying is out, the Devs are clearly focused on this new Dragon Riding (probably to the exclusion to or replacement of "normal" flying).Robin: To continue with the dragonriding a little bit, I know we’re going to start working on that from like the beginning of the expansion, essentially. That’s what was said. I was curious if you guys know how that will work with unlocking like general flying and mounts later in the expansion, have you talked about that or talk through that process at all yet?
Jackie (senior quest designer): So like your normal flying is something that we’re not looking at right now. It’s a conversation we have in the future, but for now we’re really focused on the dragonriding and the momentum, gravity-based flying, and iterating on that with our players for alpha and beta.
Tina (associate art director): One thing that is super exciting with this dragonriding is that eventually as you become extremely advanced at it, you will be able to fly significantly faster than normal speed is. So you’ll be able to traverse the Dragon Isles effectively.
Granted if the outcry is loud enough, Devs would probable reconsider it....