I also am experiencing the same issue as @Idmoray - The small perturbations in air cause a big problem for me (lots of nausea), and the mounting and dismounting also is uncomfortable (but it doesn't happen as often so its more bearable). The perturbations in air / turbulence I would imagine is just a visual affect that could be toggled (and even if it is physical, I think toggling would be appreciated even if it makes the game easier). For the mounting and dismount animation I would imaging you could just force the camera transition to be instantaneous if a setting is on.
Thanks!