As Bret pointed out, Romney failed on many occasions. He never should've cowtowed to Crowley so quickly re: Libya. He never approached the social issues that were being thrown all over the place. Yes. It was the "economy", but when Obama's "team" was scurrying 1960's issues, Romney (and all Republicans) failed to recognize them. It was about social issues.
Maybe it was Romney's choice to not go for the juggler, and maybe it was the Republican leadership. Who knows? We do know, though, that Romney had no problem chewing up and spitting out his own. That's what Republicans do best.