To echo the above comments, it could do with a little more contrast. don't overcook it thogh, as for my tastes youve nearly nailed it already.
I do quite like the composition though. It's certainly not conventional and I'm not sure how it would stand up if compared side by side with an identical, rule-of-thirds shot, but I do like it.
Especially like the small DoF used. It's not something you often see on an image such as this, but i think it is quite sucessful in this instance.