I think he turned out pretty good, have you tried using blue/yellow kneadatite (green stuff)? it may help, sometimes the tools/material used limits our skills, I personally don’t like sculpting with miliput, it has its uses, I use it as a filler, on seams and gaps, and it’s pretty good for ground work on bases, but GS is much easier to work with when sculpting details, especially for organic types.