Missed Opportunity: Nemesis should have made bans work opposite.
Picture this: Instead of a Ban phase, nemesis implements a "FORCED PICK" phase. each team takes turns adding champions to the force pick roster, and then after that's done, each team starts picking champs for the other team, but the champions on the force pick roster are your starting pool of 6 champs that have to be chosen from first.
so if the "bans" were Urgot, Evelynn, Hecarim, Lee Sin, Taric, and Syndra... the first champion you choose for the other team has to come from that list.
I think it'd be interesting to see how that changes drafting strategies. It would make for some really intense ban picks.