IsFlyableArea() returns true when player can't fly

[Gello]

It was a struggle to get this fixed in WoD (it wasn't fixed until late in the expansion) and I assumed it'd be on a checklist to get fixed in Legion so hadn't said anything, but just in case it's slipped under the radar:

IsFlyableArea() (and by extension [flyable]) returns true if the player cannot fly in the new Legion zones. While it may be true that the zone is flagged as a flying zone when the player eventually unlocks flying, the only purpose of this condition seems to be whether the player can fly.