I'll start with Butler and Xavier.
Butler plays in a weak conference and couldn't even win the Horizon League Tourney on their home court.
Xavier couldn't even make it to the championship game of the Atlantic 10, plus they've been highly over rated all year.
Hopefully the committee denies both of these teams a bid and tells them to have fun in the NIT, but unfortunately, I doubt this will happen.
Butler plays in a weak conference and couldn't even win the Horizon League Tourney on their home court.

Xavier couldn't even make it to the championship game of the Atlantic 10, plus they've been highly over rated all year.

Hopefully the committee denies both of these teams a bid and tells them to have fun in the NIT, but unfortunately, I doubt this will happen.