Yeah, I also I don't think it has anything to do with a low budget or time constraints, but simply with a lack of basic anatomy knowledge of who did the male body models. And it seems as if it is not just a lack of basic knowledge, but also a lack of artistic skill. Let me real quick sketch something to make my point...
Okay, to the right is what DOA6's body models basically (obviously a bit exaggerated) look like and to the left how they should rather look like:
View attachment 27504
Let's forget about the obvious anatomical errors, constructing a body in such an angular, stiff and unorganic and manner is aleady a sign of someone still lacking skill and courage to draw/sculpt human bodies.
I tutored design students in nude and figure drawing for a couple of semesters in uni, and this is what I always told students when drawing human bodies: "Bring curves into your drawing. The human body doesn't have a single perfectly straight bone." Building the body with concave and convex curves will make it look instantly much more organic and dynamic.