I've always wished, when you at a point re-model Sion, instead of the boring thing with the axe glowing red and green skulls you could do something like, his base model he got an axe on his back and another in his hands, when you toggle enrage on he looks more angry and hold that axe in 1 hand and when you use cannibalizme he pulls out the other axe (50% more attack speed) and become even more angry, and when he dies and just fall over his flesh start to turn to dust and blow away in the wind (like malzahar) and just crumbles to a bile of bones on the ground. That would be so awesome i would play Sion all the time. 
P.S. I don't know where the skin teams thread is, but maybe you could ask them since Twitch got venom cask that ganster throw a gas grenade and vandal a spray can. 