I posted this in another thread about Dekkers's running ability, but I agree with some that he just doesn't have a great feel for running the ball, as of right now. When I watched a replay of the game on Monday, I noticed that a lot of his runs he just seemed hesitant and it resulted in him going right into the defense. There was one play in particular, a few plays before Brock's goal line fumble, where the play was a QB draw with Brock as the lead blocker. Brock went right through the hole that the line created to get a block at the second level, but Dekkers just didn't follow him and instead went right into the o-line where a defensive lineman got off the block and tackled Dekkers for no gain.
All that being said, his overall speed and athleticism still make him a threat. I think it's still worthwhile for Dekkers to run the ball a few times a game to keep the defense honest. Like in that KU game, he still has the potential to break off a big run, while getting 2-5 yards on many of his others. If some of his running instincts improve, or if the Iowa game was just an off day, then he could be a fantastic runner in addition to his very good passing.