You have played one good offense, Penn State and gave up 31 points, the rest of the division has below average offenses. It has less to do with the amount of time the defense is on the field and more to do with the teams they are playing suck. EIU is 3rd in the division for points scored on the year, as poor as they have been EIU has scored more points than 4 other division teams plus more than Michigan St. has scored this season.
They are very good on defense, but they are not elite, and they are playing crappy offensives week after week.