Tony — The premise of your (indeed, this entire discussion) post is whether a golf course is a vase...or can even be compared to any other design artifact. While a landscape design can be preserved (to a degree), it is a changing part of the built environment.
A golf course has other, exponential, factors. These include tee options, green cup locations, mowing heights, hazards that may change naturally over time — and the "rule" of a body, committee or owner. Whether it be a democracy or a ruler, a golf course becomes what the governing body says. This was ever so true at St. Andrews where evidence has it that the earliest of changes we know about were calculated and had little to do with the ancient design. And, today, The Links Trust may pay service to the designs of days gone by, but they make and instigate change based on our modern game and what drives interest in the course today. I do not see them planting conifers, so I am inclined to agree with most of what they are doing!
I think the essence is this — A golf course is difficult to explain or to pin down. It is part treasure hunt, part landscape, part design and part happenstance. I believe it is supposed to change and embrace that ideal.
Yes, of course, it would make me very proud to see several of my designs "preserved" in musuem fashion...but in the end, lying on my death bed, I feel that it would soon come to me that there is much fun to be had if things got shaken up — so let them be renovated, redesigned and bettered.