GCA preservation is always going to be as much a mindset as a technique, so I like what Mr. Paul says regarding "holding the look," although obviously more than the "look" needs to be held. At the same time, many changes aren't necessarily all that visible in the short term, only when you make comparisons over a greater period of time.
And when you talk about changing something like a golf course, you have to ask "Are we changing forward, to something intended to be new and better, or are we changing back to something intended to be like things used to be, and presumably better than the current version?" Of all the changes that have been made to courses, most of the time weren't there people in charge of the operation who, in good conscience, thought that they were improving things? And maybe they did, given the thoughts and impressions of their time. Then someone else comes along, with their own notions of better or worse, and do it all over again. Once that cat's out of the bag, to what degree can you honestly say that you're going back to the original? When a group of restoration experts finished their work on the Sistine Chapel (I know, I'm bringing THAT up again...), some hailed the result, some hated it, some thought it was a return to what Mike L. Angelo intended, others thought they turned his masterpiece into a bunch of cartoons. Who can know? What we do know is that the latest batch of restoration experts found and removed a bunch of previous restoration while they were working. Most done in good faith, to make things better, but the standard of the day. Despite all those efforts, change continued, and finally someone came along and changed it back to their best guess of what was there in the first place. Can a GCA do any more than that?
To embrace the changes imposed by time and by man and by the slings and arrows of outrageous fortune takes the mind of a philosopher, and maybe making fun of change is somehow connected to the fact that we're uncomfortable with the notion of its inevitability............