To reel this back in, I don't think Allen is looking to build a McCroryesque empire. But he doesn have a fair amount of space to fill.
Personally, I've always admired Armstrong's approach, because he takes prototypical elements and uses them to add flavor and essence to a model railroad. To my eye, this creates a more pleasing whole, and an entertaining experience whether watching or running the trains. The Nouveau Koester approach is certainly more interesting on an operations level, but as a model railroad, to me, it's as dull as dry toast. Okay, so you have a 30' shelf with a track down the middle of it... Yawn.
Of course, you midwestern guys might be all over that, and I can see where it replicates the vast stretches of "nothing" that railroads often traverse, but to the casual viewer, it's got to get tedious.
The old Allegheny Midland was more in the Armstrong school, and was just a more interesting work of art.
Lee