Pretty reasonable, and the Duke move is probably the best guess, though they do have to be given the chance to show fully what they can do with what remains, and that will take through the ACCT to play out.
OK State after a last second one point win against B12-winless Texas Tech on Sunday will finish the regular season with a 16-8 home\away schedule skew that would be 19-8 if you added in the neutral games of the tournament they basically hosted. They need to show they belong in the top 16, but options to replace them are limited. NC State is maybe an option, but they too had a terrible OOC schedule and are dependent on a few good home wins in the ACC, since their best road win is against GTech and is not impressive.
Purdue also may be too high, with ratings back in the 20s in Sagarin and Massey, and just the two away wins at PSU and Nebraska as signature wins. Five game winning streak going against a group of weak teams, but still 4th in a weak B10.