In retrospect, if Romney had entered the fray on Benghazi and the other issues that Obama tried to raise, the debate would have focused on a lot fewer issues than it did due to overall time limitation. By not being drawn into skirmishes, Romney ably managed the overall battle quite well, not losing focus on the big prize.
Yes ..... and one thing I think he did VERY well with this strategy ... he made the point more than once that the strength of the country militarily and regarding foreign policy depends on a strong economy at home. The Luntz focus group .... several people were bringing up this point so it resonated with them.