UND's offense is a big question mark, IMO. Nearly all RB touches will be going to guys not on the team last year. Most WR time will go to guys who either didn't play or didn't play well last year. I'm hoping the OL is relatively solid, they looked much better toward the end of last season. QB is surprisingly (perhaps frighteningly?) the offensive position I'm least worried about. All 3 saw time on the field last year and I believe all 3 have proven they are capable (not great, but capable) when given enough time.
UND's defensive weakness likely will be (and historically has been under Bubba/Lennon) through the air.