The Points of Emphasis came out a couple weeks ago. I was just reading them.
The overall theme of the document is Risk Minimization. There will always be risk, but they don't want unnecessary risk, therefore they want to eliminate excessive conduct.
The four bullet points addressed:
-Excessive contact
-free blocking zone
-Sideline interference
-Illegal equipment
The long piece about excessive conduct can be distilled down to two questions when judging whether conduct is excessive: Does the player who is hit have a chance at making a play? Did the player who hits an opponent launch himself, hit the head or neck region, lead with helmet contact, or take action to add a level of violence to the hit that is not necessary? If any of these answers is yes, it needs to be called.
I've mentioned before that the biggest threat to football is liability insurance actuaries. Officials aren't excited about throwing flags or calling kids for making big hits, but if something doesn't change, no school will be able to afford the cost of insurance that will be required just to play the game.