Not a fan of the move to 20 games. Unless the Big Ten eliminates byes in the conference schedule (ie. weekends and weeks where the teams don't play), there's no way to prevent conference play from starting before the weekend of/before New Year's Day, as it usually does (granted, with the BigTen's disappointing move to start scheduling Monday and Friday games, that might still be possible).
Two possible compromises I'd favor are to replace exhibition games with regular non-con games (and start the season on 11/1) and expand the games limit from 31 to 33 and/or move the NCAA tournament back a weekend (into April, not the other way). The first solution allows teams to still get sufficient guarantee games while allowing them to continue to schedule as many (or more) tough non-con games. The second prevents conference play from starting before NYD while still allowing teams to have at least 2 days rest between games.
Of course, much like my 13 game football season proposal, I don't expect any of this to happen.