ok, some feedback, and yes i know this is WIP:
-try making the armor piece on his feet a tad bigger.
-make his torso a bit slimmer? he seems pretty stylized in the art, and you may get some cool effects actually putting that style into the model.
-sleeves need more of a shape to it IMO (this is probably already in your plans)
-collar looks kinda weird, but this may be because of the head, not sure...
i cant wait for this as a roy alt, i've always wanted one