If team A chooses a level, can team B choose the color they want to play as?
Cup admins are really useful yes indeed. Schedule your matches as much as possible in the weekends. I'm quite sure anyone can play then. Schedule the matches as early as possible so people KNOW they'll have to play.
What if the 2 rounds are tied? Its will just be a tie then?
Who will be cup admins at all? Will finding hosts be the problem of the team, or will you set a host/cup admin yourself which has to host the match?
Sorry, I just thought I'd have to ask some questions