There should be a damage overkill stat

Just to see how much Zed and Talon are actually suffering... After killing your target if you did too much damage to the target there should be a Yellow number appearing on top of the enemie champion saying OVERKILL 900 Damage. and at the end of the screen it shows the amount of overkill damage dealt to champion. Just to see that it's ok to remove some damage on those champions.