What lens are you using where you get that thin a DoF at f/9.0???
I mentioned earlier that I think it could use a little more dof, however, the big issue is sharpness. If you bump up the sharpness in post-processing, the dof can be better judged (and it will look better)... possibly enough to give a good sense of depth, without the flatness that come from too much dof. There will be a limit to how much you can sharpen this image before artifacts take noticeable effect, but the photo does have headroom for tinkering.
MarkM - DOF is determined by f-stop and distance to subject. The macro mode that some cameras have does not in and of itself have any effect on DOF. The macro mode is simply used to tell the camera to focus at close range.