Jim:
I have always said that I just let the chips fall where they may as to par, but I have to admit, I have tended to stay away from par-73 layouts.
I built one of them, at Black Forest. It was unusual in that it had five par-5 holes and four short holes ... most of the par-73 courses you mentioned have only three par-3's. And, most people love par-3 holes, so a course with only three is seen as lacking by many clients and golfers, even though I've never talked with someone who walked off the National Golf Links and was even aware they had only played three short holes.
There used to be NINE par-73 courses in the top 100 in the world, back when I was compiling it. Garden City is the only other American course that comes to mind from the list, but back in the early 90's, Royal Portrush and Walton Heath and Royal Adelaide and Huntingdale and Royal Dar-es-Salaam were all listed at 73 ... Wentworth was even par-74! Nearly all of these have been converted to par 72 in the years since, by changing the par figure for a 480-yard hole that used to be a par 5.