I wouldn't even offer my opinion on this. I feel a debate moderator has a tough position. In this case, it was even tougher. They were in the ring with some overly aggressive, desperate candidates, struggling to out-do one another, get their points (lies) across, while denying comments made by their opponents , against them.
I didn't see either side playing fair, following rules about "time" or being very respectful to any of the moderators. Basically, they all took turns (especially Biden and Romney) running the moderators over with a freight train.
Candy broke way too many moderator guidelines! Typical woman....had to have the last damned word. I was embarrassed for Joe.....I like him (as a person and father) but debate night, it was as though he was on break from his job as circus clown.
None of the debates impressed me much at all.....but then, Politicians have never impressed me. I'm terribly adverse to liars, phonies, manipulators and ego-maniacs.......
If I were ever in a position to moderate a debate between politicians, I'd sooner stick needles in my eyes.