Unlockable wisdom skins/Champion leveling system? (Huge undertaking though)

I have an Idea that I believe would be really awesome as well as get newcomers to stick around league for as long as many veterans. I propose to have a system where Riot would give each champion an individual Leveling system that shows your proficiency with a certain champion Each champion gets experience similar to your player level and after you get like 50 games with a champion to reach level 10 or whatever you unlock maybe a player Icon with your champions face, at level 30 you unlock maybe a ward skin based off of your champion and when you max at level 50 or whatever you get a Wisdom skin that shows everyone that you are experienced with that champion.

I know what some of you are thinking, Riot would never do this because you don't need RP to get it, on the contrary I think by only having 1 wisdom skin available and not purchasable it only gives something to work forward towards rather than making all other skins obsolete. with the skin requiring a huge amount of games with that champ though there would be more newcomers playing for longer.

But I think this new leveling system would do a lot for the game as well as giving it a fresh appeal.

Do you have any Ideas to make this better? and do you think it's a good idea?