I think it seems to be the curse of 28mm 'heroic' scale that humans are sculpted with unrealistic proportions, male figures have huge muscles and fists that are as large as their heads (remember the GW plastic Catachans?) Sculptors like the Perry twins did a good job of bucking this trend when they sculpted for GW, the Tanith Ghosts were excellent, Victoria Lambs sculpting is also much more realistic in its proportions.