I think the entire problem is having color mapping settings in camera. That's just not the place where should they be. If one uses cameramod it is assumed they use it to work with physical camera.
EV is not part of physical camera, and other things like Contrast and White Balance is what most professionals do in post anyway. Contrast, Tint, White balance, are things that apply overall look. I can imagine someone wants different exposure per camera, or different fstop or shutter, but look is something like LUT, that should be global, not in camera. And the most absurd thing is having highlight compression in camera too. That's just wrong.
I would suggest removing everything color mapping related from camera mod. That will remove source of any problems and confusions. So Camera would have just Sensor, Fstop, ISO, Shutter and Tint. I can't think of any other way out of this mess. This is exactly that "flexibility at the expense of usability" case.