I think that without this resignation the whole Benghazi thing might have gone away, what with the president winning re-election. I think that this new DCIA (left holding the bag) is forced to tell the truth. Maybe Petraeus turns out to be a hero in this.
I firmly believe that will be the case. He was the one that was betrayed, and now I hope he gets his ounce of revenge.
Strategic maneuvering I am sure, & I'll bet there is a spark of PATTON in him.