Hi Colt,
Are you working with track that you already have?
I like the whimsical nature of the inner loop and figure 8. Fun watching a train run it and some challenges on switch alignments for various routes.
I agree with adding some operating accessories for some additional play value. Perhaps remove that middle loop and create some space to add accessories like a log loader and coal. The coal gets all over, but it's fun to load it at one place and dump at another.
The accessories need to be within reach of a table edge as they need assistance from time to time and kids like to touch them anyway.
A 78" wide table would be needed for the O72 outer loop.
