Ed,
Not much you can do on a drop shot, design wise. A few years back, when the Buy.com tour was at my design in Omaha, the agronomist told me that they prefer the front of greens, where most shots hit, to be flatter than the back to reduce ball marks.
That course was designed in the 2-2.5% green slope era, but now, I keep most front slopes slightly below 2% to reduce the impact of ball marks.