The Hextech Crisis

The new Hextech keys and chests are pretty cool. But the way you earn them is a little bit weird. An S gets you a chest and an A gets you a key, so to get a key after getting a chest you are suppose to do worse? That is just stupid, Riot should change it so getting an S gets you a chest AND a key, or perhaps if you get the S (not someone else on your team) then you get the key and chest, but if someone else gets an S you just get a chest. what do you guys think about this idea?