Ace, nice work with your creative design. I've been going in a different direction with a bit of a post-war focus. I continued with my basic twice around design and added in a few scenery features:
roads
switch tower (red building)
auto dealerships (blue buildings)
small hill/plateau at top right
church (green building)
tower lights (brown cylinders)
I print my designs and post on the wall by my work monitor. It's in my field of view all day long and ideas pop into mind at random times