What usually does you in is the appearance of the stairs and the railings.
Gold Medal Models has both etched brass industrial stairs and railings that will make some of the printed or commercial stuff look a lot better.
I agree, Bob's stuff was the best, but I still don't see much change. The value of his work is the artwork and I'm surprised he doesn't sell it or license it to another manufacturer, because the etching on that scale is not a home business, trust me.