I think the problem with that is no suspension can cover the weight ranges that people would try to enter i.e. it wouldn't be able to cater for 150lbs up to , say, 450lbs...
Agreed - but it certainly could handle a smaller range - maybe 200 - 300 or something? The 'solo' mode feels to soft for me, while 'solo with luggage' is a touch harsh. Those settings must be based on specific weights, and I want something in between. I'm no expert, but it seems like it still has enough travel that I won't need heavier springs.
Sunshine nailed it - plug in the spring rates and the weight and let the computer work out the rest.
Don't the BMW ESA bikes set the preload when you first start moving based on sag? In this respect, the ESA system would appear to be superior to the DES system.