They would need to get their shit together coaching wise if they were going to start requiring this. In my experience with the BRS and the RR, as well as talking to/watching other coaches, some are absolutely awesome and others are almost worthless unless you've been riding for years and already have an idea of what you are doing. They would also need to learn how to coach people that learn in different ways and at different speeds, as well as taking into consideration group anxiety.
The coaches at the BRS I attempted were very nice guys and seemed to know about bikes and riding, but when it came to coaching, they just stood there for the most part. When doing the drills there was no actual coaching of anything, just showing you on a card multiple drills to do and then sending you off. It was the complete opposite at the RR course. Ken Brown (coordinator for Hudson High School site) was great, the guy with him (can't remember name, looks like Santa) was pretty good too.
I just know that if I went by what happened at my BRS, I would have given up on learning to ride thinking I did not have the ability at all. After one on one coaching, I know that to not be the case. I love my bike, I feel great on the roads, and I know I can get past the test anxiety to get my endorsement.