In addition to the OOA drills they could quite possibly expand on it a little more to incude buddy shut down drills. On a few occasions I have seen new divers bumping into one another and 1st stages becoming unseated causing an OOA emergency due to free flow and more experienced divers at the site go over and shut down the free flow and hand off their oct. The dive buddy either handed off their oct or just watched the air flow from the tank. You cant possibly cover every possible OOA emergency that can occur, but you can prepare for some of the common ones. Emergency prepardness is a state of mind in which the eye looks and evaluates possible flaws in a system and anticipates for it. Developing that skill and mindset in a diver will help to prevent most possible situations.