Elo system that is based on more than just losing or winning.
A mmr system that measures individual merit rathar than just wheter or not your team loss or won I believe would be better than our current system that only considers whether or not you win or lose.
I feel that the reason it would be better is because it would take away peoples need to win and highlight self improvement.
People would rage less because their rank isn't dependent upon how bad your team is and would reflect your contribution to the game rather than just the win or loss. I have more ideas of how it would be better but I want to see what the people think first.