now that i see your pohoto without editing I don't believe you needed to make any edits, it stands fine on its own. And like I said previously I don't think you use that lens enough. Paul.
I think you are seeing PS operator error. I went backed and looked, and the focus point was on the far swan's back. The overall DOF is about 25 -30 ft, so I don't think the MFA will help. However, I had tried to blur the water in PS, and when I looked closely, my mask had some problems around the swan. I think that might have led to what you see. This shot is without the blurred water.