Here is a thought on this subject —
Golf architecture has exponential variables. And, I admit, it does come with many constraints, too. However, at the end of the day, the variables — the wide spectrum of choices for the designer — far outweighs the constraints.
When you consider the nearly endless choices and configurations of a golf course design — alternatives, routings, flow, hazards, shapes, x-y-z contours and forms, and all of the other detailing, lengths, widths, etc. that make up a golf course — it is very difficult to believe that we have exhausted the creativity of the art. Industrial design, landscape architecture, fashion design and film do not seem to have exhausted creativity — nor have they reverted exclusively to the past. Neither has golf course architecture — but, I submit that it has come close to this reality...a love for the past and reconstituting the old seems to have an edge when it comes to "being good" and worthy.
Have replica holes, pattern holes, celebrated designs (famous holes) and trends taken over? Is there creative blood out there willing to say, "No...wait a minute...we have yet to design all of the golf holes, figure out all of the hazards and craft all of the looks of a golf course..."