"So, my question is, is there anything about that semi-skinner style blade shape that is measurably better than any of the other blade styles below for looking after a downed animal from start to finish?"
"Measurably better." The answer is NO. "From start to finish." The little Semi Skinner would not be my first choice for a start to finish Dozier design. And I have owned the following Dozier customs, a K2, K4, K6, K7, K8, K9, K11, K20, K28, K29, K31. A K2, K4, or K7 would get my buck dressed, skinned, quartered and deboned more efficiently in my experience and with my personal preferences.