A new potential game format, similar to Blind pick but all players choose a champion at the game-type selection screen locking that champ in before the team is assembled. The match making software will ensure only one instance of each champion in the game but will otherwise assign people randomly. Also rather then ranking by total wins it would be nice if wins with the chosen champion were factored in as well, though I don't think that stat is actively being tracked in Blind games.
Think of this a "Double Blind" and a bit between the All random game and the standard Blind game, haggling over champions is eliminated but team members do get to decided on lane allocations. The format encourages, even forces 'meta-breaking' games and adaptive countering of the opposition's lane assignment.