Very nice Afelium, i really dig the idea!
Some things i think were really cool:
-His eyes are awesome, they sell the boss idea.
-The Tie is not hue shifted but the colors works great to me.
-To tell the truth his general face structure is amazing i love it.
-His gigantic size makes for a pretty cool cartoon character.
Here are some things i think you could work on:
-I think you could avoid the pure whites they are really strong.
-You could simplify your clusters, make them bigger and with bolder statements(Specially on the face like Sersch said)
-Try to hue shift all tones
-You used some colors at max like 100% white and 100% Red, try to soften them a bit.
-You can also push a bit your dark values, maybe I misunderstood but it seemed to me it has a strong light from the top.
Here are some notes:
And here's a paitover to show you how Iwould approach it:
And sorry if i messed a bit with the suit design but i really liked your concept and was having a lot of fun with it, since he is really big I enlarged some parts of the suit and made super large brighter masses.
Well, hope this helped you a bit.