I think the face might do with a bit more definition and contrast, especially since the eyes and eyebrows are so strong. The breasts seem a bit too high up and perky, might be that that was intentional.
The scene will need a lot more contrast, especially since the transition from water to sky is pretty much fluent right now. Iīd either use some highlighting, or gradients for the sky. Again, more saturation would be good I think.