Maybe you can include more kungfu-esque posing at some point with the motion blur. I don't think you've done much of that, and it would be an excellent exercise to understand how to pose humans in more dynamic motion as opposed to your usual stand-and-gun style. That can improve the quality of renders by giving that extra unconscious boost that the eye sees but the brain cannot quite place.
Besides, DoomGuy gets more badass when he goes through Hell while Ripping and Tearing! =D