Have not been to the Dunes club, as that was after I left. Tim could answer your questions.
As to under rated courses, I always love Sand Creek in Chesterton. It had that old time feel to it. Smaller scale than Kemper Lakes (Ken's influence, I think) Of course, I liked Lake Arrowhead up in Nekoosa, WI, having lived there to build it for them. I still regret altering some sand dunes for better green vision on 5!
What really killed me about the "formulas" Dick had was when an agromist I worked with showed me a set of William Mitchell formulas that were nearly the same for green size, opening width, etc. And, talking with Damian Pascuzzo, Bob Graves had some very similar ones too. Dick always said the trick was to know when to break them, but not to break them too often or pretty soon you get an unplayable golf course.
We can see that with the number of, say JN courses that have more than a few greens angled sharply with forced carries. On the other hand, we an see the 50-70's era guys maybe got too attached to the formulas for playability. I try to strike the happy balance, of course, but whether I make it is up for others to decide.
BTW, the quarry breaks my design mold more than any other course.