The geometry in the clothy part is also a little messed up. It looks like before it was triangulated there were many faces with more than 4 sides, which is a huge no-no.
Also consider animation, the cloth will only move if there are edge loops splitting it up equally. And also consider that this is going into minecraft, so there only needs to be about 5 sections, any more than that would make animating it a pain.
So basically, make your models as low poly and "blocky" as possible and make the geometry look neat and clean.