I think you need to take a closer look at the shape of the head. The top of the head is really flat. Check out some pictures of human skulls and bald men - the top of the head is never flat like that. It almost looks like you ended the top of the end at the hairline in the reference picture.
Hey man, being honest I think you should steer clear of polypainting/UVing the guy and get back to the original sculpt, the forms of the body need a lot of work. Proportion (This is just scratching the surface) - You want the distance from the top of the head to the crotch to be equal to the distance from the crotch to the…