i sugges you to remove that red thing on his shoulder, its the first wrong thing i noticed on the screenshot, it catched my eye as something not blended in teh skin and completly anti-climatic. and also those big arse screws. i noticed you have a poor amount of creativity, sadly.
then for the hairs, make the hairs closer, and perhaps put shading. or simply do alpha editing, on the portrait it looks like rather unfilled.
he is way too plain, despipe of the texture you tried to do, it's impossible that's he's wearing a such armor, blizzard skins are relativly simple, just look at the footman skin, but they use a good knowledge of how armor are made. the art director sure made studies about the structure of armors, it may help you.
the extreme plainness of the is understandable, but i expected more, and i know you could've done more, your armor makes no sense lmao.
compared to most stuff here, it's decent