Pat,
Good question and a good list of potential cost reductions for courses that don't already do those things.
Overall, for most of us in the biz, not at the top end, maintenance has been a big driver of design features forever, but we kind of forgot about that in the go go 90's. Now the emphasis is coming back, but I am not sure its even quite as high as when I entered the biz in 1977, but that is just my experience.
You don't hear about it much any more, but there used to be the "design triangle" of maintenance-aesthetics-playability. In fact, in 1977 I wondered if the emphasis was so great that we would ever build a great course again, with all the limitations. For most mid level projects, our owners picked maintenance as the most important element of that triangle up until 1990 or so.