Ray,
It’s great to see the variety of work that you’ve done!
One suggestion I would have is to try some traditional / digital drawing / painting to really increase your understanding of the human figure ~ it’s really a proven axiom that the best digital artists are the best traditional artists ~ I think both really feed one another, and I have a feeling if you did some traditional drawing in particular, you might find where the weak spots are and be able to better and more quickly address them than through modeling.
One person who is primarily a 3D artist but who is learning a lot by doing 2D Drawings and Paintings in order to enhance his 3D is kary:
Anatomy thread of kary
Another person who is both 2D and 3D is Helen~Baq:
Anatomy Thread of Helen-Baq
And razz has done some really great parallel 2D and 3D exploration and studies:
Anatomy Thread of razz
It would be great to see you try some of the Portraits in Traditional or 2D Digital Media. I also think that doing Master Copies in general, in 2D Traditional / Digital Media, will enormously increase your figurative vocabulary.
This thread contains a lot of free resources for Master Works which I encourage folks to copy:
Master Copy Resources
Looking forward to seeing more of your work. 
Cheers,
~Rebeccak