The biggest problem I have with it is that on parts where the Wiss will need a bench cut on a steep slope, you are going to destroy a large swath of forest floor trying to place a bench wide enough for a gator to pass safely. These areas are going to plentiful given the steepness of the landscape. It won't blend to the landscape as well. It takes more natural habitat.
Chuck, while I agree with the narrow trails being better for the environment and most of the user experience, there is one situation when the bench cut needs to be wider. And unfortunately, it is on very steep slope, for several reasons.
1. User experience and interaction. In a relatively flat area, like Demo I, the user can safely and easily step aside off the trail for passing, not so much on a 20%+ side slope, so trail needs to be wide enough for safe passing, be it hikers or mtb. That's positive user experience.
2. On a very steep side slope, the trail needs to be anchored, to prevemt crombling of the dirtn downslope side and collapsing trail. Again, need a slightly wider bench.
That said, the bench doesn't have to be 5' wide, but it cannot be 18" wide narrow ribbon. Some blance needs to be struck. Like you said in one of earlier posts. Cut the becn a little wider, it looks even wider due to disturbance. But in few month with leave litter and new growth it will narrow down, and only actively used part of the tread will be exposed, this naturally selecting what actual width is needed.
dz