I don't think they were trying to run up the score. They got down the field by throwing the ball they were doing the same play calls that got them the lead. It's the same story though whatever they did if it didn't work would have been the wrong call. They run the ball and it's why did they get away from what got them the lead.
They ran the ball on 1st down for no gain so went back to what moved the ball down the field. Unfortunately MVP Ryan didn't throw the ball away. Bad holding call on the next play. While that was bad the entire execution starting after they went up 28-3 was bad.