Hey Paul,
Nice work.
Used the PMC kit myself.
Your very right that once you put it on a computer you notice more.
Just a few things, and I totally understand your not finished.
Are you adding any foliage to the tree? Not sure about the multi colors on the exposed brick,I think one ,maybe two.The guy at the pickups door seems to really be doing nothing.If I recall,he's supposed to be a diplomat with a briefcase.Also the center figure has his hand back telling someone else to stay back.May want to rethink the figure placement?
Try Tamiya TS-80 for a flat spray, lately I've found this better than say Dulcote.
Looking forward to more photos.
All in all,I think it's looking great.
The only thing that really matters is that you still have fun and take any comments with a grain of salt(what ever that means)
Tom