Dim the light on the right of his head, it takes away from the focal. I like your use of the color lights, but they seem a bit too prominent. The effects are great, flow is good. It looks oversharpened on his arm, chest, and helmet. Take a blur brush at 10% on luminosity and go over the sharpened areas till it doesn't look too pixelated. It's the easiest way to fix oversharpened areas.
yeah the lighting was a little too extreme, good work on the fix. text is meh, but the flow and c4d/arrow brush(?) usage is great! i love that arrow on his right arm. depth is also good, though i would suggest darkening the background slightly to make him pop