Mastery Champion Icons?

I've played Heroes of The Storm (blizzard game) a long while ago, and I noticed something that I thought could be implemented into League. If you played a champion enough, you would get an icon for that champion. Play them more, you would get a better icon for said champion. Imagine something like that in league. Me, a Zoe main, would get mastery 5 on Zoe. (already do) and I would unlock an icon for her. It could be something simple, like the icon she has in the collection screen. And then, If I were to hit mastery 7 with Zoe, (almost there) I would get a new icon, with a flair. (For Zoe, it could be something like her twilight butterflies around the icon. [It would be even cooler if say, they were animated in the profile screen?]) Anyway, it's just a thought. ;)