It would be nice to have a match history statistic that showed WHICH champions you killed/killed you and how many times.

I've always been curious as to which champion I've died to most, and it would help to evaluate post-game play to see what you could do differently if you are having trouble against a specific champion on the enemy team.

I understand the possible toxicity aspect of seeing how many times your ally died to the enemy Zed, so maybe make only your own kill/death history visible?