The coaches are optimistic, but I am waiting for evidence that Michigan can run the ball without Molk. Toussaint, the first U-M running back to break out since Mike Hart, is also waiting--for the outcome of a pending OUIL. When he plays is a matter of conjecture. Hoke says he doesn't know. The backs behind Toussaint have talent, but none (except, perhaps, Thomas Rawls) seems an every-down back. Vincent Smith is proven, but can the five-foot-six, 175-pound Smith hold up as a primary player?
Offensive line depth is thin. Unless (very highly regarded) freshmen step up fast, injuries could pose a problem. The same is true at wide receiver, and tight end is worse. Only one recruited TE, Brandon Moore, has any experience, and his playing time has been limited; A.J. Williams, a freshman TE who looks like an OT, will be given a shot for some immediate role.
There are questions, but if (a) the team stays reasonably healthy, and (b) Barnum can play center, and (c) at least one offensive lineman and tight end step up, Michigan will score a lot of points.