Garland,
I am intrigued by your idea of having low handicappers rate for low handicappers and high for high.
Although a four-ball may include both levels of skill, the players are essentially playing different courses. Not only do they hit the ball different distances, their "margin for error" is different and their targets are different. Green complexes that are interesting, even exciting, for skilled players can humiliate weaker players. (For example, the crowned greens of Dornoch or Pinehurst #2.)
I would still argue that the ideal course is "challenging for skilled players but provides options for the less-skilled." But it would be nice to have raters of diverse skill levels determine how well a course meets that standard.
GD, as others have noted, requires its raters to have an index of 5 or less. GD's premise seems to be that low-handicappers are better judges of good architecture. I doubt that is the case. At best, there might be some weak correlation between a player's skill level and the number of quality courses he/she has seen. Better to choose evaluators directly on the breadth of their experience with good architecture.
James,
As for N Berwick's test of driving, I think it has many holes that require clear thinking and execution off the tee. Even #1 requires a decision about how far to play down the fairway and at what angle. The choice may be strongly influenced by the strength and direction of the wind. #2 requires a decision about how much of the beach to cut off. #3 requires a strong tee shot even if the direction is less important than on 2. #5 tee shot is menaced by fairway bunkers, left and right, requiring a decision about direction and whether you can carry a bunker. #8 is a minefield, requiring choices on both the tee shot and second...depending on the wind. #13 poses an interesting question about whether you wish to approach the green on a line more parallel to the wall or more across the wall. #14 requires a decision about how far to play down the fairway across humps and bumps to set up a blind approach. #17 requires a precise drive between the fairway bunkers, taking into account the rollicking fairway, or a lay up leaving a longer shot to a dramatically elevated green.
N Berwick is a great course IMHO.