I suspect ND would leave not for competition reasons, they'll always be able to field a competitive team, but probably not a powerhouse consistently. Instead, they wouldn't like the travel, and really they are an outsider in HE. My guess is they'd go to NCHC, I don't see mutual interest between them and the B1G.
As for HE #12, MacMahon seemed to think Holy Cross. Puke. My preference is very much for QU - better facilities, better program, better location, a nice in-state rival for UConn, overall better fit IMO.