You could even squeeze another siding in there if you wanted to...
...although in this case I'd remove the one I've marked with a red dot just to make it a little less cluttered. It does also strike me that you could get a point + siding in the fiddleyard too to cut down on the amount of manual handling required.
Having said that... I actually prefer Kris' earlier version with the medium points. That just seems to flow a little bit better, probably helped by the slightly curvy nature of the whole thing. Feels more realistic. If it were me building that (and I'm tempted!) then I would probably end the headshunt on the right going under a bridge so as to suggest the line continues on - that's about the only part of the plan that might be difficult to get looking right/realistic. It would also provide a neat viewing 'hole' between the two bridges into the little goods shed area.
Couple of other thoughts - it might be possible to fit in a kickback siding coming off the long siding, although a question would be if the added operational interest it provides makes the overall scene too crowded. The other thing I note is that having the goods shed backing onto the fiddleyard means a hole could be left in the backscene and open wagons could be filled with something suitable before they are shunted out again.
Very much an urban scene, I think. Closed in with retaining walls, warehouses, space at a premium, that sort of thing.