They don't have Mangum, or a brand new OL, and they're not playing Wisconsin.
They want to pass. The opponent doesn't really matter. They had no problem passing a bunch and lighting it up against Utah in the first half last year.
Wilson isn't it there to hand the ball off. That doesn't mean they'll abandon the run. Of course they'll want to run. But not the way you're making it sound. They have to pass to win games. The offense is built around him. Just like the offense for the Wisconsin game was built around Mangum's abilities and the personnel.