RD,
David's changes to the purple were perfect. Here are some more enhanced shots of what the layout may look like in the room. I like leaving the yard table legs open, closing the end and using round legs. Then, it's attractive and one can see the trains in yards and look through it. 3/4" with stained edges would look fine.
I closed in the green line. It could be possible to leave the aisle edges open for a view of the green line under everything.
Looking at the original plan document, I am have having trouble visually with the industrial area spurs and the commissary/express freight yard on the large on blue level or top level. They look like appendages that don't belong on a freestanding table.
It appears that it was designed to be against walls.(the plan document notes building flats) If you build yours freestanding, they look really awkward and detract from flow of the layout from the yard side and the end.
I don't think that you would lose a lot of operational value deleting those tracks for the aesthetic improvement of the layout. I propose that they be eliminated.
Perhaps I can get some track on this and show the purple exposed running on a ledge by closing in under the blue level.
Here's some more 3D's.
