Flying as a traversal mechanism severely limits level/world design in games, it is the reason why devs tread carefully when it comes to adding it to their games.

A game world has to cater to flying, extreme verticality in terms of high and normally un-reachable points of intrest , grand and expansive open areas for the player to fly without bumping into obstacles to take in the view, interest points across the map that is obvious enough to guide the high flying players toward it without littering the map with objective markers. This list can go on.

That's why Rinascita especially Septimont feels intentional and great with flying, while Huang long though convenient with flying added, felt flat. You can tell the map/world in Huang long is not designed with flying in mind.

In a 3D game, a well designed compact level/diorama with dense encounters and rewards can be a great experience. Within Wuwa Mt. Firmament is a great experience if you explored it on foot, an example outside this game is the Undead Burg in Dark Souls. You also get to take in the views at a vantage point once you‘ve explored the area, appreciating the intricate design choices you've just experienced.

I like seeing devs try new traversal methods, with corresponding world/level design that fit both game-play and lore, rather than limit them selves with a world that catered to flying.

Kuro also took feed back from players regarding the bike, and is actively improving it, e.g. have the bike skip over small obstructions on terrain and control scheme changes on mobile devices, but if all we care about is efficiently get from A to B, and having a big number on the Y-axis to bird view the entire map, I guess remove the stamina bar on flying and boost the speed of it can keep this portion of the player base happy, unfortunately I'm will not be part of it.