Shouldn't the bans be like something like this :

each player bans 2 champions .. for example in TOP i don't wanna see trundles and gp
there are 150 champions ... banning 20 of them doesn't hurt . also yes , i know that some champions(yasuo lul ) gonna be perm banned , but this says something.. as long as riot doesn't nerf those picks .. they will get banned even if a team had 1 ban