Your basic point is a no-brainer, but as someone who has experience in the industry, I take exception to your characterization of it overall. Sure it feels good to signal your virtue, but to me, it sounds as if you really don't know what goes on in the golf industry with regards to environmental issues. Golf is a big industry, and as such, superintendants have strict constraints, especially fiscal, that make efficiency a requirement for continued employment and that's just to start, exceptional situations not withstanding.
Take the Chesapeake Bay's pollution issues for example, the overwhelming amount of pollution there comes from ignorant homeowners, not professional agronomists or farmers. My suggestion would be to do some more homework & gain some more experience prior to popping off.
Moreover, to characterize the disc golf community and its environmental practices as somehow more worthy or preferable merely because of scale is also a canard. Most of the disc golfers I've met and played with over many years can't even identify the most common tree species in their area, let alone possess a 4-year degree in agronomy - if you believe in the value of that sort of thing.
As for the OP's question, it's a good one. At this point for me, a 'destination course' is just an excuse to get out of town for a while, but I look for how close a course comes to being a 'complete package' with a strong emphasis on the formal elements...