DO NOT BAN NEW CHAMPIONS IN NORMALS
Normal games are THE PLACE to try out new champions. Go ahead and ban them in ranked play, no problem. But there is NO reason to ever ban a new champ in Normals. it is FREE PRACTICE with a new champion with NO REPERCUSSIONS.
If you pick a new champion: you get to try them out and get a feel for what they can do. If someone on your team picks a new champion: you get to play around the champion and understand what to do in order to be successful with them in your team. If an enemy picks a new champion: you figure out how to play against them and shut them down.
Please, don't ban new champions in normal games.