The camera controls make this game unplayable for me, and I would wager many people.  I never have issues with motion sickness playing first-person games, but this game has given the camera controls momentum, so the movement of the camera is not one-to-one with the mouse movement.

DON'T. EVER. DO THIS.  And if you absolutely must for artistic reasons, provide the option to use normal one-to-one camera controls for accessibility.