I don't quite agree with the assymmetry though.Assymmetry in a posing serves to give life to the subject. Otherwise it would just look like a variant of the T-pose. That's also the reason I kind of hate male humans posings. In real life we rarely stand up symmetricaly with the arms straight down (the posing you provided is stiffer than the original one and less natural).However, the arms don't 100% complement the lines of force suggested by the curvature of the body. Also, the hips could maybe get shifted more towards the pivot leg to reinforce the suggested intention. Something they might have taken into consideration is the different weapons equipped, the gears, and the shape choices. So the spacing of the arm may have been a bit inevitable in a way.All in all, they did a decent job on that aspect.