TEPaul,
I've played Augusta, and don't share Jeremy's view, that the course is architectually unworthy, save for the Masters, which in his mind gives it its sole architectural credibility.
Cosmetic change is adding length, expanding bunker size, relocating a bunker to keep it in play, narrowing fairways to tolerable widths, changing a bunker line from scraggly to crisp.
The golf course is architectually worthy, and I would ask anyone who has played it, who disagrees to elaborate on its architectural weaknesses on a hole by hole basis.