Interesting development - it just means it'll be up to OCU/Sqn QHIs to teach the appropriate technique on type. AAC had a similar experience - my first job on reaching my exchange Sqn was to teach the approved wingover method after some numpty made a pigs ear of just such a manoeuvre in Canada. Unfortunately for the pilot, he wasn't distracted at the top of climb by "terrorist activity" so he didn't get promoted afterward.
Actually, doing it at a later stage in training might not be a bad idea. What works in a Squirrel may well be totally inappropriate in a Merlin.