Tom -
As you note, the process of restoration is not a lock step, mindless process. The goal is always to end up with the best course possible. The goal is never (or rarely) restoration simply for the sake of restoration.
But when you have a course designed by an architect of recognized, national standing, a club's decisions about what to restore and what not to restore ought to always give deference to the design choices of that original architect. It should not be anything goes. That does not mean that his original design choices will always prevail. It does mean that anyone wanting to alter those original choices has the burden of showing that his changes will improve the course.
That can be a messy process. We can disagree about what "improve" means. But I think those ought to be the basic rules of the road. To change an important historic course, you better have a damn good case for your changes.
Taking ANGC, I don't think MacK was given the benefit of that burden of proof. As it turned out, some of the changes probably made ANGC a better course. But many others changes did not.
In either case, however, an honest, careful consideration of what MacK might have had in mind did not take place. At least as far as I can tell. (And what he had in mind was pretty clear. He wrote a lot about ANGC.) With the more recent changes, something like bad faith was at work. People justified their changes based on a (knowing?) mistatements (I'm trying to be polite) of MacK's stated goals.
Bob