Sean,
Golfclubatlas.com is a valuable domain. Do a search for Pine Valley Golf Club. Result #2 for me: the courses by country from this site. Google likes this site because the content is good and original. But as you point out the edited IMO pieces are an effort, and if you don't want to go through that, the DG is the path of least resistance. What I'm suggesting is that Wikipedia is a model of an in between structure between an edited contribution and a discussion group. Like a discussion group, Wikipedia allows and encourages contributions, on any subject, at any time. Like an edited piece, Wikipedia encourages contributors to act as editors and intervene and correct where necessary. When you have engaged participants, the two roles seem to balance out, and you get a highly scalable content engine.
Going back to Rich's point, in my opinion, the way to provide a more focused discussion about the courses is to add structure that reflects a different goal: creating a more comprehensive and universal compendium on golf course architecture.
The payoff is that given the value of the site, the work done would become a global reference on golf courses and GCA, and given the power of the web, a prominent one. It's not like the DG would go away, rather, there'd be a forum where we could all build out our view on a subject we love without the disagreements. More sausage, less sausage making.
Dave