I think a lot of stems from him not having a big day against OSU. Because all indications prior to that game seemed to say he was rising. But since that game, I've seen much of the same things you did.
He wasn't great in the game, but I don't htink he had a bad game. I thought he hurried Smith a few times. I know in that game he had 4 assisted tackles and 1 fumble recovery.
If he has a big game against USC, then I'm sure his stock is going to go back up again.
I think he or Purdue's Anthony Spencer have the chance to be the first 3-4 OLBs drafted this year.