Howdy, Kyle,
Just a few ideas you might consider:
And a suggestion. To visibly separate the curved connector from the staging entrance - functionally - model a boarded-up industry as a flat behind the staging entrance, with a suggestion of there having been a now-removed spur to service it. That way the curve looks like the main line, even if not operated as such.
The only other thing I see is a need for passenger facilities if modeling the transition era - even if the passenger train is only a single RDC. In the more recent decades the station buildings would have gone from boarded up to demolished or recycled as restaurants or antique shops.
Chuck (Modeling Central Japan in September, 1964)