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It was pretty sound advice. The colors look aweful. Desaturate them so they fit with the template. If you don't know what desaturate means, it means you should make the colors more neutral, like closer to grey than the pure color. That also appears to be pillow shading, which is a major no-no.
He says to desaturate the colours Zeos, thats constructive, and all you've written is "A WIP sprite of mine"... That doesnt really prompt much feedback.
That is a horribly shaded forehead. You need to shade around the hairline. The belt lacks any depth at all, and I can barely notice any shading because of how close the colors are and how dull they are put on. And, btw, the middle of the pants should be brown as well, not some funky purple color.