Great use of leftovers
I’ve got some of those AW doors, so many uses for them.
If you were looking for any extra tweaks, or to add variety to future models, how about adding a bit of clutter to the roof tops...a rusty metal square hatch, box-like aircon unit, communication gear, or even a bit of discarded tarp?
Likewise, it’s relatively easy to breakup the flat space on the walls with a square bit of card representing some sort of gadget, maybe with a bit of wire/cocktail stick running down from it to the base.
No criticism meant, just offering a few extra ideas