Defense.
With the offense still trying to perfect their timing routes and get the playbook down there will be more INTs and incompletions, and with any contact "drawing a play dead," wouldn't that aid the defense? It's basically two hand touch, so it doesn't allow for the receivers and running backs to break any tackles and get any yards after contact, and all you have to do is run by the red shirted QB for it to be considered a sack, so there isn't much of a chance to ground the ball or throw it away.