Suggestion re. 12 ban system
Every patch note and new champ release makes it more evident how easy it is to imbalance the game.
I believe Bans are the only way to achieve the balance Riot developers have had difficulty sustaining.
10-bans is a good step but not enough especially w/ overlapping bans.
I propose adding 2 bans, where the client randomly selects two champs from those w/ ban rates of 50+% over the past week. According to Lolking charts, this currently has a pool of Chogath, Yasuo, Draven, Blitzcrank, Maokai, Zac, Zed, Darius, and Kayn (50.1%) Granted that this is not alist of "broken" champs but may also include champs that are irritating to play against.
After this the normal ban/selection phase would go through as current but w/ both sides aware of whom the client has banned. This would not add time and should help to create more enjoyable matches.
SoloQ ban is already different from professional, so I see this as a natural and superior progression.