TO's did hurt Iowa last week, but Mich. St did expose Iowa's D for the first time this year. Mich St. took the ball 80 yards for a TD on their opening drive. Then Iowa Fumbled, and Mich. St. scored another TD on like a 20 yard pass. Iowa relies on pressure by the front 4. If that doesn't happen, they're in trouble. Thats what happened last week. If navaar has time, he'll pick Iowa apart. I'd be very surprised if Iowa scores over 15 points in this game with their lack of O weapons.
FWIW I follow a lot of Big 10 and Big 12, Iowa has one of the better front 7's in the Big 10 on D, but DB's are suspect, and feast on the bad throws the pressure creates.