A New Incentive for NOT Dying
How about make it where players cannot join a new queue for an amount of time equal to half the total amount of time their champion spent dead in their previous match?
Because no one wants to play with allies who end the game with 15+ deaths.
It's a penalty that would be issued to most or all players, I know, but the penalty would be lessened for players who die a lot less. And it might actually give people reason to think on their choices before acting on them.
Most of my recent losses have been because of players forcing fights that did not need to be fought and losing said fights...repeatedly. I figure this might help prevent that.