I agree with the OP. STL has a "ghost-town" feeling to it. I fly through it a couple of times a year for work and even schedule the occasional connecting flight when it makes a difference tot he price. I put STL in the same category as PIT. The difference is that last time I was in PIT they had walled off a couple of the concourses which weren't fully used so you couldn't really see how far the concourse went (and how empty it was). Perhaps STL should do something similar. The last time I was there the concourses were just a never ending stretch of nothing. if I remember correctly the last time I went through MEM it was a similar feeling as well. I wonder if CVG can be lumped into that category.