I still don't understand why this hasn't been done. All we'd need is a mount that shows up on our backs, levitates off the ground, and has flying animations for HW areas. They could have so many different kinds, from angelic, demonic, mechanical, elemental, magical, city state origin, and etc. they could even make an exclusive wing dungeon, allowing us to float, and navigate through an airspace of flying monsters. Obviously due to limitations, such dungeons would likely have to have a map, and some form of boundaries. You'd simply hover over an invisable floor space that has moving scenery below it, and fighting with wings on would only be allowed to be used in the said dungeon. Floating in the middle of a canyon, some kind of magical tunnel, and magical transparent walls in the clouds, or space all come to mind for dungeon ideas. Levitation themed mounts would also work.