There is another issue, what about addresses that follow a custom address template (and possibly leverage the Address Hierarchy module)?
What I’m trying to say here is that we had solved all this with a patient header that would make sure that you can obtain all edit sections dynamically following the registration app config. What sort of shocked us at first with the Ref App is that the user would feel locked out. There would be no simple way to edit things that where just provided.
Looking back at my code it is possible that most of the changes should in fact go to the Registration App module, but that doesn’t change the initial question: is there an interest for this?
Ah! I found a screenshot that I had showed up back then, here.