Last year, South Carolina and Notre Dame were very close for that #2 seed. But, with Lexington, KY hosting the regional, the only way for Kentucky to be placed there would be for South Carolina to go elsewhere due to both being in the same conference. No surprise to me that the committee made it so that UK stayed home as the host.
This year's big decision looks like it's for the #3 overall seed between USC and Baylor. It's important as it keeps one of the team's out of the overall #1 seed's bracket until the potential national championship game. So, comparing the team's body of work is really important.
USC and Baylor both beat Ohio State; both lost to UConn. Baylor beat UCLA at home. Both beat Texas on the road, but Baylor lost to Texas at home as well. Baylor beat Tennessee on the road, while USC lost to the Lady Vols at home. USC beat Mississippi State twice. And, USC won both the SEC regular season and tourney titles. Baylor only won the regular season Big 12 title.
So, if USC's RPI and SOS are higher than Baylor's, the committee should give USC the #3 overall seed to keep the integrity of the bracket. Baylor getting to play in OKC shouldn't be a big factor.