The horsecollar tackle was clearly wrong, BUT, I'm not sure I wouldn't have made the same call at full speed. I'll give the officiating crew the benefit of the doubt on that one.
However, the hands to the face on Suh was ridiculous. The replay didn't show anything that warranted a penalty at all. Apparently even the officiating crew was confused, as they were ready to walk it off against Mizzou. As much as they were holding, if it did occur I understand why. There was a play later in the game where a Missouri OL dragged down one of our DE after he got past him, and then laid on him on his back to keep him down. I was screaming at the TV, as it was one of those plays where Gabbert had all day to throw.