Hunky-Dory I dont know if you actually use the system or color grade, but contrast and colors are not an issue with the camera but with the crew who shoots and they dont know how to shoot correctly to maximize dynamic range and the colors are from the post production team. Basing on the kind of colors they render out from their k2 pro scenes, its an active choice they are making or lack of proper color grading skills.
The R5C is a full fledged cinema camera with high dynamic range so dont tell me it's not good enough for porn haha
Get proper crew that know how to use it and color grade, then we can have that discussion. I'm sure netflix would also not certify this camera if it had shit contrast and colors haha
Anyways, yes the scaling is an issue on closeup subjects, canon did not make this lens for porn where everything is meant to be within a meter of the lens. The IPD of this camera has a further sweetspot between 1 and 2 meters away