Aetherytes are numerous and well placed (Except CCH, it desperately needs a Whitebrim or Boulder Downs crystal).
You can ride just about anywhere in a zone in under 3 minutes, and fly in about half that.

The biggest problem with continuity / momentum / flow is the egregious lack of actions while mounted. You can't speak to an NPC. You can't initiate an attack action. You can't repair (although you can do this while sprinting).
Forced manual dismounting is a clunky mechanic. Mount. Move. Dismount. Do something. Re-mount. Rinse and repeat.