In answer to the question, "Does the 7th green complex at NGLA represent an optimization of the methods of play to a green ?" I would say no as the green side bunkers are so deep as to prevent recovery for a large segment of less skilled golfers (i.e. some would have to pick up from both the front and back bunkers). And for me, optimum means accomodating the greatest range of players, though plenty of others like Crump/Fownes/etc. had a different take.
Certainly, the variety of hole locations created by the 7th green complex is awesome and how diffcult/easy the hole can thus play is wonderful, really first rate. And with all aerial and ground game options open to the player, indecision can be the golfer's undoing, especially those in no man's land of 10-70 yards shy of the green. And of all the great shots at NGLA, the approach to the 7th - be it from 10 yards, 60 yards, or 220 yards - would have to rate at or near the very top.
Still, Pat, in terms of optimal by the strictest definition possible (the one citied above), I wonder if a green complex needs to be bunkerless to be optimal? Like 5 at Royal Worlington perhaps or the double plateau 16th green at North Berwick? That way, all can play and finish the hole. Or at least, a "pit" shouldn't guard the green and the bunker depth would be more manageable. If so, the original vague boomerang shape of the 1st green at Riviera has no clear superior in terms of the available options it created for both the 2nd and 3rd shots. The recently built 13th green complex at Rustic Canyon would also receive very high marks for the same reasons.
Cheers,