I like the plan, Michael!
If it were me, I'd probably leave off a couple of the stub-ended spurs, for the sake of simplicity, & more scenery...
It's a classic design though, that puts a point-to-point plan in about half the space.
It also looks like the space is there, so that it wouldn't be too much of a stretch to include a loop at the upper left end, if you wanted to have a continuous running option.
You didn't say what the dimentions, or scale was,(my old, "much more wiser" eyes can't read the tiny type in your diagram

) so I'm assuming HO, about a 4 1/2ft deep shelf, along two walls, about 22 x 17 ft? It also looks like a couple of the curves are pretty sharp, so you might want to go with an industrial, freight kind of theme, using shorter length equipment.
The plan looks like it would provide room for plenty of rolling stock, & locomotives in the yard area...If it's against the wall, though, it might be kinda tough reaching those tracks in the rear!
How about bringing the loop area out into more of a peninsula, & narrowing the yard areas a little, for better access?