Modern's face is a bit squashed, he could be rounded out more. His feet on the idle don't look like they're touching solid ground, and he seems a bit stiff in some areas, also notably he looks like he's leaning over. I suggest that while using renders and stuff for reference does help, I suggest grabbing a few jazwares figures for further refrence on the head. Some of the areas DO look a bit pillowed.
And for the render, Classdern's gonna freak when he awakens!
And for the render, Classdern's gonna freak when he awakens!