Your question is irrelevant, because it doesn’t touch on why static flying needed to be removed and its return is a compromise simply because of how positive dynamic flight has been to the game. The same issues and problems still exist with static flying which is why it has to be limited, whereas dynamic flying still have some issues but they are all off-set by positives and it removes the primary negative function that makes static flying detrimental to the point it almost killed the game.
Here’s a longer post I have written ages ago so, understand not everything is 100% relevant but overwhelmingly it explains a lot of the issues with flying as it used to function (and yes, it is a hefty read):
If you want more information about all of this, you have to start off by understanding the concept of “induced demand” (a term that has to do with how motorways cannot decrease congestion and how reducing superfluous access is a positive). Access to flying in WoW is an induced demand.
Nope. Not metrics-driven but rather psychology-based on how people behave and interact both with the world but also other players. Dragonriding/Skyriding solved a lot of these issues that have been accumulating ever since TBC, all whilst also making sure that flying was available as a real QoL feature (flying outside of during Cataclysm has never been an actual QoL-feature, again - you need to understand “induced demand” in order to understand this).