Read some interesting things on BSSC and AI5's sites recently, anyone with interest in the ALSR probably has too. Among them, that DV is too soft "in places" for a high speed ALSR. When we surveyed this site in two different years, we found soft spots too, although these were dealt with by wheel packing, much like the Black Rock City Department of Public Works (Burning Man) makes "roads" at BRD. Andy Green is quite correct that the surface varies over its length, and the same can be said of almost any playa of more than 10 miles. Our larger concern was the rise and fall of the course line that this would cause leading to some of the "ski jumping" that Andy experienced with TSSC in Jordan.
One solution is to use less course. Higher thrust to weight and higher thrust to drag ratios lead to shorter acceleration runs, shorter decel, and more runoff room on a given playa. This also leads to less variation in the playa surface over the shorter run distance. Another solution would be to have a lighter car. This would require a radical departure for all of the established teams. As we all have found in our racing careers, adding lightness is about as easy as removing drag. Do both, and many more venues open up as well as shorter areas of the known ones...