New game mode idea

One thing I find very boring about pro league of legends games is the lack of diversity in champion selection. Every game the same 10 champions are always picked. This is my idea for a fun game mode that the pros can play at all starts or another event. This mode doesn't work for solo queue but for pros. The game mode is this, two teams play a best of 3 on summoners rift. Everything is the same except each champion can only be played once in the entire series. If one team picked tristana, then NEITHER team can pick tristana for ANY of the other games. This means that each game will have ten unique champions. I think this would be a lot of fun since we would get to see interesting comps and see how skilled the players are with different champions.