What Playing Team Builder 24/7 for 2 months would do to a Rioter's ideas.
Remove Teemo from Summoner's Rift and move to a map of Bandle praries where only yordles are allowed. Delete Shaco. Delete Evelynn. Delete Rengar. Delete Kha'zix. Delete Quynn. Delete Kalista. Rework Yi (again). Rework Nidalee (again). Rework Kassadin (again, or simply delete). Rework the entire untargetable champion mechanic - link to skill or cs count. Update Poppy. Update Urgot. Skillshot every supress in the game or chop off your own dick. Rework LeBlanc and Zed's bullshit teleport damage. Tie it more heavily to skill. The End.