There is no big deal with a backwards auto, it can be useful if everything goes quiet and you have one small landing site ahead...if you do a 360 you may lose it but if you slow down and reverse keeping your heading all you need to do is to know what height to re enter a forward auto and have the speed for a flare and safe landing. I would therefore suggest that they should be taught...surely keeping your one small landing site in view is a huge benefit and getting the roll out from a tight 360 on track is not easy.! Maybe i am missing something or they would be taught!!