Thad Matta and Tom Crean usually put out shallow nonconference schedules in terms of lack of quality teams and high numbers of cupcakes, with them gone, I expect those two programs to schedule better in the future. Can't blame the current coaches at those two for the schedules this year.
I did the math myself, Thad Matta had the absolute worst nonconference schedules in the B1G over the last 7 seasons (2011-2017) in terms of the most of what were practically guarantee games, averaging 9.1 per season (games vs low or mid majors at home with no return game ever), fewest "name" teams (27), fewest nonconference tourneys with 2 or 3 games at a neutral site (1 in 7 yrs, Rutgers was the only one even close to that with 2, while 10 programs were in 6/7 or 7/7). And he made the schedule this year, with 8 more cupcakes (& zero true road games), but a rare treat in the only 3-game neutral site nonconference tourney he ever scheduled as a head coach. He had some strong opponents on these schedules, but didn't have a single season in the top-100 of nonconference SOS per KenPom in this span, 2008 I believe is the last one he had that was top-100.