New Classic Map Mode

Wouldn't it be awesome if Riot made a Classic Map mode where you could play the old version of champs alongside the new ones? Like old Karma and new Karma, old Katarina and new Katarina, as well as April Fool's jokes like Urf. I mean, it would be awesome to see the old and new pit against each other. Maybe even have the old Summoner's rift art in there as well.