Great work and fine tweaks. Ship it!
Actors have stage makeup applied to their entire face and possibly neck. Meanwhile hands and chests do not receive makeup. When looking at skintones, bear in mind that the face will always look a bit unnatural because it is all covered in foundation makeup (yes, even on the guys). To see real skintones you would have to look at the hands or on Solo's chest, for example. Anyway, that's why faces always look a little tan or odd - because of the stage makeup.