JMO
The Shazier hit should be a penalty, especially if the league is seriously trying to reduce concussions. Refs blew it and if any expert interprets the rules otherwise, then the rules are screwed up. But, we already knew that didn't we?
The Burfict hit was a penalty as well, just to be consistent. Brown was destroyed, didn't dive, and it should have been called.
My problem with the next PF is the time in the game they made the call. I'm a hockey fan, and the refs in that league are the best in the world. Why? because they understand the game and don't end up being a huge part in deciding the outcome of the game. The NFL refs do that every game. Whether it is the rules or the league itself, or the incompetence of the refs. The notion that the letter of the law is always followed, and know rational judgement is used, is a problem.
The Bengals deserved to lose because they fumbled the ball when the game should have been over.
JMO