Colured animations
I think that a cosmetic update entailing a extra slot for dyes only for the champions special abilities unlike the chroma packs would be a cool new mechanic in games. You can get creative with this say you can have this dye at lvl 9 and this one once you have gotten a triple kill and so on.
(My intention was not to make the designers of these character mad if I have).
Give this discussion a rating on how you think this idea would do in the game and please leave a comment.