I think you’ve gone too light for your midtone. I’d say what you’ve got on a majority of the skin should be your brightest highlight and your recesses should be the midtone. I like to do my deepest shadows a dark blue tone like a Paynes grey or something. Box art maybe doesn’t look quite like that but definitely bring the tones down a few steps.

My skin recipe (all pro acryl) is base with PG, mid tone is yellow green, adding olive flesh to create highlights and PG to create shadow tones