I'm a Mizzou alum and I knew USF would be a terrible matchup for us. USF was incredibly underseeded... people forget that three big losses were to UConn, and they played in their conference final. They're quick and they defend and rebound well. they should have been at least a seven. Plus, Mizzou not a great road team and they're playing in Florida -- though not really close to USF.
Belmont acquitted themselves well. They have had a great season here in Nashville with a lot of fan support. there's only one senior on the team so they should be back next year.
I went on record a couple weeks ago that the Pac 12 was way over-rated. And then over-seeded. I said I doubted that any Pac 12 team would make the Elite 8. Oregon State should pull this one out, but in my opinion the level of play in their conference this year didn't pass the eye test.