That was completely on Cassidy. He BIT on the playfake and let someone get behind him. It's like O'Hanlon's mistake last year against Tech. You don't let someone get behind you when you are playing that role as safety.
In response to why it might feel like Musburger hates your team more than he used to. Welcome to the Big Ten, you are now a conference member with his Northwestern Wildcats, the more you beat up on them the more he will hate you, looks like he is already getting started.