Yes I may need to look at the legs again, it's been mentioned by others, though I think they look skinnier than they are in that heavily shadowed render. I often revisit models and tamper though. Spent most of Sunday inside the mouths of the grey wolf and Wolf of Fenris, rearranging the teeth, as I was not happy with the effect as was, and the original model had the mouth quite wrong. Trouble always is deciding what pose to set the wolf face in, as a snarling wolf looks very different from a more placid wolf and although I would love to animate the face in game, the retracting of gums, shortening of muzzle etc, just isn't practical. Might be able to do something with the ears though.
Possessed is not a bad comparison, and the arms are from possessed marines, though I have altered them more since.