I think the reason why the zone works against CU is that you can still play their shooters tight in the zone because there are only two really dangerous guys (EW and DM). CU can get EW and DM open easier when they can screen. Against the zone the other guys get open looks, but they're not ready to gun them. The shot Chatman just took is a case in point. He was wide open but you can tell he really was unsure about taking it...and that's when they're already down 30.
Plus CU doesn't offensive rebound super great which is another typical zone weakness that you don't have to worry about too much vs. CU.
Plus CU doesn't offensive rebound super great which is another typical zone weakness that you don't have to worry about too much vs. CU.