What might be a more suggestible idea would be to select a certain number of team compositions that are allowed due to their competitive nature (e.g. RMP, Demo RLS/P, MageEleDisc, EleDemo/AfflictionRsham/Disc, etc) and allow teams to select the comps they wanna play out of a list. It would spice things up much more and maintain a viewers attention much better. Something along these lines sounds all around more fun for everyone to me.