David--
I agree with you completely re: SLCC. I started a thread on the course, with a few pictures, back in early September in which I wondered if it was a near-perfect course for a GCA mid-handicapper, given its rich variety of playing options, historic value, CBM pedigree, etc...
Why is it not ranked higher? Who cares! It's probably the same reason a number of other courses don't "rank"--1) not that many people get to play the course/play it more than once/have played it in many years or since some of the restoration efforts 2) It's in St. Louis, not the mid-Atlantic/Northeast 3) It hasn't sought out the limelight, and doesn't need to, etc....
Hard to call this one a "hidden gem", but in terms of GCA, I think it fits...
Peter