I recall a post by a well known avionics shop man saying that the PPL/IR examples got in as a minor mod but that EASA have within the past few months blocked that route.
A pure RNAV approach approval remains an EASA minor mod.
(FWIW, on an N-reg I don't know of a way of getting the 337+AFMS approved. I have some contacts but nothing concrete. It's probably done by submitting the papers to a US FSDO via a contact in the USA).
I agree regarding the safety angle, of course. But I don't see any evidence that EASA policy runs on safety. Everything I see is driven by blatent in-your-face work creation. It may just be a coincidence that work creation and safety go hand in hand but why is the work creation angle always so obvious while the safety angle remains so non-transparent?