We don’t know where the Paul voters went, assuming McCain’s voters went to Huckabee, it means 60% of the Paul voters went to Romney, but that wasn’t enough.
Romney is not liked by the other candidates, and that will hurt wherever they can team up on him.
I do not believe there is another state that uses a runoff election like W. Virginia. So I don't think they will get the chance. It's mostly plurality wins from now on.