Frelon,
A superb post! (#3084)
The best people to advise the Air Cadets how to run Air Cadet gliding are all those people who have been doing it, as volunteers, for the last 75 years. Input from the BGA and the RAF is likely to be of benefit where appropriate, but there is precious little evidence that Air Cadet gliding instruction was not fit for purpose.
One big problem in perception is that the British Gliding Association is not what it says. Its members glide only when they cannot soar. An airliner can glide, but it takes a sailplane* and a sailplane pilot to soar in normal conditions. The BGA teaches gliding as a stepping stone to soaring and cross country flying. The Air Cadet Organisation teaches gliding as a means to learn take offs, circuit planning and landings, as well as learning teamwork and the discipline to safely operate potentially hazardous equipment.
Whist there is a lot of benefit to Air Cadets experiencing BGA and RAFGSA club environments, it is being the big fish in a small pool that gave Air Cadet gliding the edge it had. Training with senior cadets who are of an age that the trainee cadet can relate to, is very different to having an instructor with more diamonds than De Beers and who helped Percy Pilcher build his first glider.
It should also be borne in mind that BGA and RAFGSA clubs are largely volunteer-run for the benefit of providing soaring, and the training to get soaring, to their members. Those members did not join to be Air Cadet helpers, nor did they elect to sign up to a whole raft of regulations that the Air Cadet Organisation may consider necessary. BGA members are also going to want to know how their organisation and their own gliding is going to benefit by the BGA diverting from its current aims to provide Air Cadet-type gliding to Air Cadets.
*Not forgetting that hang gliders and paragliders are also soaring aircraft.