Not sure about the stance, I kinda like that he looks like he is really focused and ready to strike. Ever thought about something like an idle stance/animation when you do not move for X-seconds?
Dead Space does that where in between moving the pawn looks really cramped, but when no input is given for a few seconds he assumes a more relaxed state. That helps a lot when transitioning into and out of movement. Anyway, its a 3D game so maybe hard to apply.
What I definately like is that you pulled down the helmet one pixel towards the eyes, make him definately look more serious
