What about the fact that SAN is in the southwest corner of the country? It's not really along the path to any other cities. Would it be convenient for connecting pax? I like STL because of the brand new rwy, empty gate space, and the lack of flights that go there now. And it's also near the middle of the country, which is good for coast-to-coast or north-to-south connections. BTW, I'm originally from STL so I may be biased as well.