Mac, how about we zero in on Crump's desire to accomplish your point number one ....it was meant to test the mettle of the very best.
Again, Archie, I have not played the course...but studied it a good bit.
I think the concept behind the "test of golf" is the driving force behind the architecture of Pine Valley. I remember talking offline with Tom Macwood about this era in golf history and I recall him saying that during this time frame the Brits were killing the Americans in all the golf competitions and the Americans were looking to improve their competitiveness by developing more difficult golf courses. Furthermore, I've had recent discussions with Tom Paul about the fact that Philly golfers were also looking to improve their competitiveness versus their New York counterparts in the same way. With these facts behind the scenes, I feel that there is no doubt the Pine Valley Golf Course was one of the "improvement centers" or "proving grounds" for elite level American/Philly golfers. And the golf course was designed with this in mind, first and foremost.
Further to your points, "how could Crump do this on this first attempt?"
First off, his golfing ability allowed him to be able to envision what type of course needed to be built to serve as the "proving grounds" for elite golfers, as he is noted to have been an excellent golfer. Funny story from "Pine Valley, a Unique Haven to the Game". Crump was playing with a business man of the area who'd just plugged his ball into a massive bunker. The businessman said, "why are theses bunkers so high, if I fall off here I'll break my neck?" Crump said, "Now you've got it. We build them so high that the dub golfers will all break their necks. This course is for champions."
Secondly, he was a creatively intelligent problem solver. As part of the upper crust of society, he had a well rounded education and this, no doubt, helped him combine his raw intelligence, creativity, golfing ability with American/Philly golfing needs to develop a truly great golf course for the elite golfer.
Thirdly, he was not egocentric and opted for a collaborative approach. Being an excellent amateur golfer with an educated intelligence, but still a novice architect, he sought opinions of the best of the best while constructing the course; Tillinghast, Macdonald, Wilson, Fownes, Thomas, and Travis.
And I think one of the MOST important points regarding how he got it right in his first effort was TIME. The construction process began in 1912-ish and wasn't done until 1919/1921 (?). Of course, Crump never saw it in its completed form. Nevertheless, from the beginning if mistakes were made, the time was taken to correct them. Mud was taken from the bottom of swamps to make greens and the grass died. No problem. Re-do them. This may take time, but with no contracts or business mandates/time tables to deal with Pine Valley could correct things and get them right before opening the club. I believe this aspects of time, covered up a lot of trial and error and mistakes.
But, to your point about a "test" of golf. I believe that was the reason for the course, at least one of them. To improve the playing ability of the people using the course and train them for competitive golf formats. Perhaps this is why you see so many cross hazards, difficult and well protected greens, and the like.