I think 3 Ivy League teams is too many. Princeton losing tonight is perfect; and it should give the committee the excuse they need to exclude them from the tournament.
But they lost to Harvard, which is not really a bad loss.
Conferences aren't assigned numbers of bids based on proportional representation. Each resume is individual, and it just so happens this year that the Ivy has 3 teams that are extremely close to the cut line (although one of them will of course be the AQ).
I agree Princeton's resume isn't great, but the bubble is weak. Who is the team that should get in over them? Virginia Tech? James Madison? Minnesota? UNLV? Those resumes are not great either. It'll be a close call.