I'm not a fan of just taking the air out of the ball, unless you're up 10 with maybe 2 minutes to go or something. I'd rather see a team run the offense, but be patient. With the 30 second clock, it runs down pretty fast these days anyway..
That said, there was a possession or two with maybe 3-4 mins left where I thought Iowa held the ball too much, but after that, it looked like they went back to trying to execute something again. So I don't think they were too bad today with getting too conservative too early. I'd have to go back and watch those last 5 mins again, though.