Dale,
Good question regarding Cal Club. As I'm sure you know, too, Macan's work there was a remodel job. Mackenzie and Hunter were the third/fourth architects involved with the development of the Cal Club course... and, about the time they became involved there, I presume there was a bit of a "buzz" in California about the doctor's "availability" to do work around the state. Macan or Mackenzie, who was already in the area?
Shaughnessy is an interesting study. I've read about Macan being given a "freehand and unlimited budget" there, during the late 1950s, which promopted me to track down an early 1960s aerial of the course (it opened for play in 1960, I think). Upon receiving this aerial, I was shocked with regard to the bunkering. I expected not to see many; but, frankly, the early 1960s aerial of Shaughnessy isn't much different than most other Macan-designed courses: Very, very conservative use of bunkers; and, those bunkers seen in the aerial photo are very simple in shape. Nothing any lover of golf course architecture would rave over.
In part, this suggests to me that Mr. Macan was (again) confident the course layout and greens would provide sufficient playing interest and challenge. No need for too many bunkers!