I've found the camera reacts more to turning speed when mounted, which takes away from the mount's feel a bit.
A separate slider for the rotation when mounted would be nice.
they first need to fix the mount camera, press and hold Q&W and then press and hold D.
I don't use keyboard camera turn (Q&E are bound to skills), I always mouse-turn. So don't know what issue you mean.
And a correction: the problem is that the camera while mounted doesn't respond to the Camera Rotation Speed slider at all.
they need to put free cam on mount back first...
I have just noticed this issue today like Goettel.4389. When I'm not mounted my camera rotation is super fast which is the way I like it. When I mount up it is longer on a fast rotation and slows way down. I made a video for a point of reference so everyone can see what I am referring to.