Penn State is one of only two Big Ten teams that play none of Indiana, Oregon, or Ohio State next year. The other is Wisconsin. This is a makeup for Penn State and Wisconsin because both of them played all three of these schools this season.
Meanwhile Michigan, USC, Nebraska, and Northwestern play all three of the Big Ten's Playoff teams and Northwestern has the misfortunate of playing all three of them ON THE ROAD! On the other hand, if you're going to play Indiana, Oregon, and Ohio State, you might be better off playing them on the road as opposed to playing them at home when you'll likely lose to them anyway. And to add insult to injury, none of Michigan, USC, Nebraska, or Northwestern play Purdue.