Excuse the crude MS paint markup, but I would go with something like this. Move all the crossovers out to Alligator Point or Huntsville Add a 3rd track for arrivals/departures. Extend one end for the yard lead so you can make up/break down trains without tying up the main, and a small 2-3 track engine terminal on the other end. Some curved switches might help fit some extra tracks in.
