Eric,
You are right that people who do not own A-Class cats should not be telling the class what they should do.
I have loved A-Class cats ever since I saw my first ones back in the mid 1960's. Gosh, that's 40 years ago. And I have always wanted one, but now that they have come back, I am too old for one.
So I am going to give my opinion anyway. Right now the class is building/rebuilding very well. I do not see any benefit for the class to allow hyrofoiling in any sense of the term, whether it involves slanted or curved daggerboards or T-foil rudders or whatever.
You guys have what is, in effect, a one-design class at this point, with the only difference being the platforms/manufacturers. And it is a GREAT class with lots of top sailors participating.
Why would anybody want to fragment it by allowing hydrofoils in any way, shape or form? I think it would spell disaster for the class.
The people who want you A-Class sailors to do all the experimentation and development are voyeurs. If they want to try new things, let them do it themselves or in their own classes. Why should the A-Class mess up what is finally turning out to be a great class after more than 45 years since its inception?