Depends what materials you employ, surely? And I'm sure you can plan the station with a separate, large Central Hall unlikely to need modification. Connect it to sheds in more flexible materials in a classical style. Or produce something entirely different. I just want classicism and historical styles in general there as an option, and I'm extremely dubious that practicality is the main issue after hearing endless architects go off on one about "pastiche"! Actually I'm convinced that the split between historicism and modern architecture is false. Holden's designs certainly reference the past. Architecture should be an extremely broad church.