Bit more of an update. I have put some more geometry in around the leg joints to define them a bit better, and a bit of work around the eyes to give him some eyelids. Still a bit of a problem with gaps around the eyeballs though. I'm not sure how I am going to deal with this since the eyes are large and spherical. I think I might use a deformer lattice on them to flatten them a bit and make the eyelid shape a bit flatter.