Looking good Cody!
Curious if there is anything specifically that gives you the uncanny valley feeling Mark?
I’m getting a bit of the uncanny feeling as well, so I made some notes that will hopefully help:

Another thing I forgot to mention above is that the eyebrow hairs are too thin and you may want to try painting a density map for your SSS, so that you can have more scattering where there is cartilage and loose skin and less where there is bone. E.G. the base of the nose between the eyes should have much less SSS than the tip of the nose.
You’re well on the way though, keep it up! Faces are one of my toughest enemies, so props for tackling such a difficult subject.