I've always liked AM's big covered terminal. As Jim suggests, making a raised foundation should solve height restrictions for traditional O. Looks like loads of width for 2 tracks in O too.
Ideally, I'd like to see a proper O gauge version made in kit form. Modualar in form it could be expanded to whatever suits the layout...side by side or end to end. Given the architectual style the majority of it could be made from materials other than plastic (ie. plywood walls and platforms sprayed with stone texture paint). Plastic details could be as minimal or abundant as personally required.
A correctly proportioned station could also follow the same specifications as above and have a moveable tower like the original. In this way it could also be expanded upon.
Might just get out the jigsaw and router and give it a try!
Bruce Webster