Mastery tokens in ARAM
I get that S ranks are more common in ARAM, but they arent "every game" often. I myself try to stay away from Summoners Rift as much as possible, mainly because winning and getting S's are determined entirely on ganks. If the enemies have a better jungler, you have to spend the next 40-50 minutes fighting an uphill battle with nothing at the end. Even if you could just get half-tokens from ARAM, im sure other players would appreciate it too.