The regionals just flat out favor Denver, North Dakota/Minnesota and all the Eastern teams. There are so many great barns being passed over in the midwest it's sad, which would absolutely carry attendance.
MECCA in Milwaukee, Resch Center in Green Bay, Cincinnati, Toledo, Van Andel in Grand Rapids, Kalamazoo, Chicago (where DePaul plays) Cleveland...even Indy. ALL those plaves would have great attendance.
The NCAA has essentially ignored the upper midwest/Great Lakes region for quite a while. It is mystifying to me.