I would add more depth to the eye colors, more skin tone variations & natural contouring such as flush, some shadowing & more brightness around the orbital areas.
LEss rubbery shine to the fur for Miqo tails & Hrothgar fur, why is it SO SHINY LIKE OIL, RATHER THAN HAIR OR FUR.
fix dark skin tones to show lighter palms and lighter bottom of feet.
Eyebrows + level of thickness as a slider.
Also add a way to have more than 1 "tattoo".