From all this discussion, I'm just eager to see what the new version will look like and how it will work. I'm confident that no information will be lost--the person that submitted the waymark is stored, the people that edit will be stored, etc--so if something needs to change (back?) then the info is available.
I do tend to think of waymark listings as "mine", so I might have to adjust my thinking. The idea of edits by others might turn out to be interesting when we "encyclopedic waymarking" types encounter waymarks submitted by "personal experience" types...
Good luck with the rollout!