TEPaul,
As to the technical question, I don't think the part circle heads would add that much to the cost, as the pipe is already there, and will add even less in the future, if and when they become standard. Drainage used to be expensive, but with the evolution of plastic pipe, became cheaper, and then more of it was put in where necessary.
Purchasing and placing usga sand down the approaches is pretty much a one to one cost ratio, not likely to go down because it will always require detailed labor, as well as the material cost.
Seems a bit extreme in most cases to build USGA approaches, but I have always tried to pay special attention to the green approach in drainage and irrigation because most golfers (on walking courses) traverse this area as well as at least three sets of mowers turning in this area (fw, green, and collar or bank) which causes damage. last but not least, the occaisional run up shot goes through these areas, and should not have a plugged lie from overwatering and mower turn damage. With the advent of more cart play, we also pay attention to the drainage, etc. in the area between cart path and green.
More interesting to me is your quote:
"...the nonprofessionals are every bit as good at analyzing the playability of golf holes and courses once they're made and that is damned important! Maybe the ultimate importance in fact!! "
where you raise the interesting, even Tom MacWoodian, question of whether the art of golf design itself has any value if there are not critics to evaluate? (If a golf course evolves in the woods, but nobody sees it, does it really exist?)
Your post also vaguely reminds me of several local art, restaruant and movie critics I read that seem to say, "They will like what I tell them to like!" Is this your percieved role of GCA - "tastemakers" in golf design?
Let the discussion begin!
PS to Mike and all - sorry for the "topic creep."