Tone down that purple-orange gradient map. Set it to soft light and 40 ish opacity, as it makes the sig seem very monotone.


Second point is your text, try not to split it up like you have keep all text in th same area that way it's less distracting. I'd try to use plain fonts too rather than these fancy ones you got going there.

Blending is good maybe blend his shoulder a little more. Also wheres your light source?