SandL
You make a sweeping statement about current training that I can't agree with. I did mine in 2014 with Roger Savage and there was a lot of emphasis on rotor management.
Also, I was not taught stick back/FULL throttle as a default take-off and nor is that the method in the latest training manuals from Gyrocopter Experience.
I'm sure there are good and not so good instructors out there (as there will be for any type of flying) but your assertion that there is systemic deskilling (by which I assume you actually mean insufficient training) is not one I recognise.
Mark