There isn't disagreement on how to handle emergencies, there is following the flight manual and not following the flight manual. Most operators act within the manufacturers guidance. Handling notes from eurocopter are pretty good, most drills are straightforward. I am snoozing reading the crappy arguments about autorotation entry. On Central Flying School, we used to chop the throttle on people without notice. I have seen many varied entry techniques under pressure, most work as long as the lever goes down. At the bottom you have a sliding scale of survivability depending how many of the landing techniques you attempted. I used to send people first solo of they could lower the lever at the top and attempt a flare/check at the bottom. The rest was icing on the cake that I would expect by half way through the course.