I will suggest though that this problem is common to all photographic mediums, the problem with slide film is that the fix has to be applied during the camera exposure because we are going straight-to-final-output. With negatives we can change the scene lighting or we can burn, dodge and manipulate when we print, or both.
Personally I no longer peg any exposure to shadows, my choices are always centered on the mid-tones I want to print, shadows and highlights are simply allowed to fall around that come what may. I will on occasion use a high tone and an offset to peg my mid-tone. I avoid using shadows as a peg because I find judging them unreliable.
Onward, I'm not understanding what extra limits you see with color negatives, can you elaborate.