As a result of the success of Seidelmann Run I've been doing a bunch of layout planning lately.
Working somewhat backwards, here's the latest staging plan.

Now that the water heater has been replaced I think this might be the next phase to actually begin construction.
What I don't like: It's actually only four tracks (six with the shorties in the front).
What I do like: It fits! And those four through tracks are long enough to hold multiple trains on them. There's also plenty of "shotgun staging" in that helix between the decks in the upper left.
Tell me what I'm screwing up with here.