Bill:
Pat makes the all important structural point to a concept such as a reversible design---lack of trees. To pull something like that off and keep it functional tree encroachment really does need sort of double monitoring.
Travis offered George Crump a reversible routing at Pine Valley to quite a lot of fan-fare in his magazine American Golfer in 1915 but obviously nothing came of it. I do have Travis drawings of two holes that way (actually more I guess)---#1 and #16 and it did require twice as many greens and tees obviously. And of course Flynn did a 9 hole reversible course that Wayne and I have played a number of times on the Rockerfeller estate of Pocantico Hills.
I do think an 18 hole reversible course, a really good one, is probably something that was ahead of it's time but the thing I think is really ahead of its time is what might be referred to as "courses within a single course". That's something that George Thomas, who, in my opinion, may've been the ultimate conceptual genius of all time in architecture did a few times in a partial way in California.
Unfortunately, because of a bad flood or perhaps just misunderstanding of the utility and interest in such a concept, it didn't last.
But the concept of "courses within a single course" is something I've been dreaming about for a few years now. If you think it's a bit of a jigsaw puzzle and complex to route a golf course, trying to route, and then DESIGN, the various iterations of a "courses within a single course" golf course to really make sense and play well That'd be, in my opinion, about twenty times more complex and difficult to pull off even remotely well than the routing of a regular golf course.
But I would love to see it done well somewhere, someday. Matter of fact, I'd want to take the concept even farther---whereby all the "courses" within a single course would not only all play well but when on one you'd scarely know there were others!! In that way I see such a thing as a bit of a "Rorschach Test" effect!!! But again, as Pat said, the site would have to be pretty open and kept that way.