Like the others, I'd move the sticks a little closer to the buttons. Don't add the room in the middle, add it on the edges. Depth from the bottom looks pretty good, but you're pretty close to the side edges out there.
Remember that your hand/arm doesn't connect to the controls at a straight angle coming up from the bottom. They angle in from the sides just a bit. You do need some room on the sides so the heel of your hand isn't falling off.