RJG,
Here's a thought to remove the "s" curve by the station. Flip the accessories (just west of the station) to between the tracks and keep the distance between the parallel tracks equal all along the bottom of the plan. Next, either plan for a hatch/opening near the 90 degree crossing or build benchwork strong enough to hold your weight because you will eventually have a derailment and/or an accident in the middle that you will not be able to reach from the edge.
Otherwise, it's a very nice toy train layout.
Chuck