For the record, I sail an A-Class or will when it quits raining
Any sailing class should do what the members want and other than idle discussion it is nobody else's concern.
The Moth's are cited recently as cutting edge but they have banned things that were not in keeping with where the members thought the class should go. The Moth class banned Tunnelhulls and as a consequence all multihulls. That is their business.
The A-Class is struggling with hydrofoils. It is not proven that hydrofoils are a good idea for a varity of water conditions. From my limited experience with them, I don't know.
As Mary said, if you want to try hydrofoils look at Formula 14. On mine I will cant the boards more this year and look at banana boards. Anything that raises the bow is by definition, good. on my boat.
In general, don't complain to loudly about what a class should do, unless you have your money invested in it.