Craig,
One seldom modeled feature of above track-level passenger terminals is the track crossings used by baggage handling equipment to ferry baggage to a single, centrally (or non-centrally) located baggage elevator. Platforms at track level could easily add this feature, but would require metal stools scattered along the platform for passenger car egress. Raising the platform to comfortable passenger car egress levels would require slight dips where the track crossings would be built.
In my older passenger rail days, I remember seeing both methods employed.
Chuck
