It's not a bad idea, but everything is a bit too weak and insignificant. Don't try to make things realistic. Exaggerate things that are strong and hide the ones that are weak. For example: the hair is tiny, make it longer, lusher with more volume to it. The shoulders are on the other hand, gigantic blocks of iron that…
Big question is what you plan for his back :) As that is most interesting area in Brew as far as ingame view goes. Front view looks solid having in mind his poly limits. I would personally just remove red hat as that goes into TF2 funny items territory a little. From what I observed they dont accept funny sets recently and…