New Tournament champs

I have been thinking of a new setup for your best of 5 series. I love watching the pros play but the one thing I don't like is that it always seems to be the same 15-25 champs throughout all the games. I have thought of a way to fix this and bring new life to the LoL professional games.

What if during those series any champ that is picked or banned is now out of rotation for the rest of that series? It would force the teams to adapt a series strategy of who they will use in which games and what team comp they want to run. I believe the math works out to support this. there are 127 champs right now so your first game would use up 16 champs leaving 111 for game two, then down to 95 and so on finishing up with 47 champs for your final game. it would leave you one champ short for a best of seven though so that would be something to work out or add more champs before the next season starts.

Just my two cents and I'm sure someone will poke holes in it, flame on.