I've made a few more tweaks in case anyone is still interested. I elevated the bottom portion of the left loop of the dogbone, which required relocating some sidings and switches. I added a hill inside the elevated portion, and some hills along the right side to elevate town's main street a bit. (Hill renderings need some work but hopefully you get the idea.)
I also added a long yard lead across the top at the suggestion of my brilliant friend Eric. If I come into some extra money, I'd like to add a 3 or 4 way switch at the yard entrance to gain more storage. Another option would be to put a curve where the yard is now and run a much longer yard all along the left side where the sofa currently is. Hmm... bigger yard vs. creature comforts? 
