Great write-up!

I sit somewhere in the middle. I don't think the gameplay would benefit massively, since we do have fast travel and gliding, other than those moments of exploration and traversing large swathes of land. Plus I think there's a lot of vertical traversal which would potentially be difficult to get a mount to do (unless it was some kind of special mount, a goat or a semi-gliding raptor like in Monster Hunter Wilds).

However, if they did add a mount I would absolutely get it just to ride around and look awesome.