every champ with equal scale would be all champs balanced
1st, the only mode that matters is ARAM. The rift, even watching pro play, is boring. The whole farming thing, ganking, buffs ... all of it is boring.
Let's face it, if you like easy, play coop vs ai ... if you want challenge, then random has to balance as well.
So given that only ARAM on the H.A. is the only mode that matters, how do you balance random? Make the champions scale the same, remove insane burst. Then it is all skill, all the time. No "getting ahead" and then you win ... because if you don't continue to play your hardest, you lose.