Just a few thoughts on the last few comments. And yes this is only from 2 data points...
But the guys I played with would occasionally drive it past me. The difference is that it was usually followed up with a topped iron that goes into the bunker, and then two more to get out of the bunker followed by a 3 jack...
Whereas as a general rule for mid-cappers such as myself if I hit a bad tee shot, I can usually follow it up with a decent recovery to at least get myself into position to shoot no worse than bogie. However High cappers are never out of the danger zone until the ball goes in the cup right?
As a general rule George has it right, lots of forgiveness with little trouble to be found is good for them.
That being said I would think one of the most difficult aspects to design is keeping it playable for the HHs and interesting for the low handicapper. I often heard its all about the greens, but would imagine there is more to be considered off the tee and in the fairways...