Ban Appeal System
Riot, I think the automated system has helped to limit toxicity, I know that myself have been effected by this and are now taking more time to moderate my behavior in games (granted its out of fear of getting banned again because I am still sure that a premade can report you for nothing and you will get punished for it. Thats how it seems to me.)
However, I feel there needs to be a way to rehabilitate toxic players and a way to restore banned accounts through an appeal system. Since banning them is essentially achieving nothing, since I doubt that is the only account these people have and they will just create another.
So why does it have to be an endless black void when somebody gets banned. Aren't we better if we can rehabilitate formely toxic players and give them some hope that improving their behavior will reward them in the future.
Use a carrot, rather then the stick Riot.