Hey Riot, I think something that would me a lot more useful in ranked stats (The pie graph) is if you did things based on averages. Like Average Kills per game.
That way you can compare champions based on performance, and not how often you play that champion.
Average Kills Per Game
Average Turrets destroyed down per game.
I hope that makes sense. the current system may show 1 champion has more victories than another, but what does that matter if that same champion has also played 2x's more games.