Thinking about it a little more, if I were a Buckeye fan, I'd be a bit worried about the defense.
In the first game of the season, the defenses are often ahead of the offenses. And Minnesota's offense did very little unexpected, schematically, with much less talent on the field. Yet, OSU gave up over 400 yards of total offense and over 160 yards rushing to their starting RB.
Again, it's just one game, but significant improvement is needed in multiple areas for them to be better than they were last year.