So Denu, are you planning on updating this? It is definitely a quality texture, just lacking in the ingame contrast department.
Just a suggestion: since the left arm and the wing share the same UV area, why not do something that would fit for both? I'm thinking maybe glowing cracks and whatnot to exploit the wing/arm area (think a little like Hueter's Fire Mephit hands, or the BC concept Illidan's tattoos). Including the current version of the skin wouldn't hurt either :)