Given how they struggled against Michigan, your angst is well placed. I'm hoping they'll win, but they need to have a strong outing.
I think the B1G Championship Game, it's really a matter of whether MSU's offense will score enough to win. The defense will obviously slow OSU down a bit, but they're still going to get their points. The offense has been miserable (first month), great, and then had a few moments where it stumbled (last week).
MSU has got to score 21+ to even have a chance to win. Also if they hold onto the ball (#4 in time of possession) that will help limit OSU opportunities.