It wouldn't have mattered. Ron uses logic and facts in debates, totally useless in a debate against the Donald. It would be like shooting rubber bands at Shrek, except Shrek is a nicer person.
Romney didn't attack Ron Paul and vice versa.
Ron was very good at comebacks, and he wasn't as hotheaded as Rand, so I think he would have been one of the only ones to put Donald in his place.