Very interesting, but since it's just a scarm exercise
maybe you could take a look at that yard in the
lower left. I didn't count the number of crossovers
but there were many. Don't understand why.
Instead, why not try a 'ladder' track thru the yard
using slip turnouts? You would have much more
'car space' on the spurs on either side of the 'ladder'.
A slip would permit train to go straight thru, or
turn off into any spur.