The format of the NCAA tournament doesn't really do a good job of determining the best team in country. Every year you have a couple teams in Omaha that's nowhere near the best 8 teams, and a couple teams who clearly are and didn't make it.

I've kicked around a format in my head something like this: 8 regionals of 8 teams, but everyone plays a full round-robin over the course of 2 weekends. So Friday-Saturday-Sunday, a "midweek" game, and another Friday-Saturday-Sunday. The top team in each regional makes it to Omaha, with ties played off on Monday.

You would still see some upsets, but I think this format would do a much better job of getting the best teams into Omaha. Sometimes you see teams make it who aren't that good and didn't even beat anybody good either.