Mr. Doak came into this discussion forum one time and pointed out that if an architect can't do any better than to reproduce yet another biarritz then they probably won't have much of a future in the business.
Now he may not have said this in exactly the same words as I, and I say this because I know what a stickler some people around here are for context, but the gist of his comment was that if you fail to believe there are still new concepts out there that have yet to be discovered you are severly missing the boat.
Prior to Gil Hanse's 15th at French Creek, I had never seen such a hole.
Some of Kingsley Club is unlike anything I had ever seen before.
Mike Strantz certainly has his own unique look.
Mr. Doak's work at Cape Kidnappers is pushing the envelope, IMHO, when it comes to golf holes I've never seen before.
My point is this.....good golf architecture is not found by reinventing the wheel, so to speak. There are certain elements to any good hole that should never be deviated from. Yet, there are numerous ways to skin a cat, as they say.
Take Macdonald's NGLA, since it was some of what CB had to say that has fueled this thread. At NGLA he created something unique in that the holes were not direct reproductions of the original Redan, etc. But, of course, everyone recognizes that the 4th plays like a "redan," looks like a redan......although many think the NGLA one is better than the original at Berwick.
Conclusion.........We ought to have learned something in 150 years of golf architecture. If a gun was to my head and I had to say what that was it would be that there are certain types of shots and challenges that all golfers relish attempting. The "essence" of these shots needs retained in all designs. Many of the classic holes embrace these. The redan calls for a low burning draw with action. The cape dares a player to bite off as much as they can chew. The Biarritz forces one to be accurate. The postage stamp style green requires even more accuracy.
These shots are fun, challenging and separate the "wheat from the chaff" when it comes to matches.
So, to answer the question, future designers should emulate "the qualities" of the great holes, but they should work to create new and exciting "golf holes" that we have never seen before.