I think this design has great potential. It might be a bit tight for switching, depending on the operating scheme and how you represent the connection(s) to the "rest of the world".
It looks like the Worldwide (left) end of the layout is the end of track. So maybe cars arrive on the layout via the interchange track from the north, and from the lower right where the "main" line seems to head off the layout. It looks like you have about 24 spots on the layout. For realism, I suppose it's highly unlikely that all spots are full all the time, or that all would need to be switched out in a session.
So let's say maybe there are 10-12 spots to be switched in a session. You have room for about 5-6 cars in the curved interchange track top left that were set out overnight by the interchanging railroad. Plus a local train of 6-7 cars can easily arrive from the bottom left on the "main". If there's no room for a staging cassette or extension to the south of that, then the session could start with the local tied up on the outer curved track top right. Maybe the crew outlawed, or they're in the café you'll model trackside.
The session would consist of switching out cars for on-layout spots, swapping cars at the interchange track, and making up a departing train to leave bottom right. Some cars might need to be pulled and re-spotted also. I bet there's at least as couple of real hour's work here which is excellent considering the small layout footprint.
However (you knew that was coming, right?!) I would highly recommend running some ops sessions in your head or on paper to make sure it's possible to make all the moves required. I suspect you might need to cut down a little on the number of spots, and give yourself a little more headroom to pull and spot cars at some of the industries. There's a recent thread on MRH that worked through a simialr process on a smaller shelf layout that might be helpful:
http://model-railroad-hobbyist.com/node/23125
I am keen to see how this evolves as I am a big fan of narrow-footprint, sectional, modern era shelf layouts. That's because I'm trying to do something similar in O scale and I seem to move house every 4-years...
Pete