|Hi Tom - welcome to the Critique Zone!
Having looked at your portfolio, and having checked out the other comments, I doubt that I am going to tell you anything new, but here goes...
Technically: There is little to say - from what I can see of this shot it is pretty much nailed, and looking at the figures, you were working that lens/camera to get the shot anyway. Perhaps if you were working at 200mm, you could have dropped the aperture and gone faster? I don't know - these shots happen so damn fast anyway, it's just that 1/400 seems a tiny touch slow for an eagle in flight!
PP: Perhaps a little extra sharpen after re-size? Other than that, the vignette really works here.
Artistically: IMHO, this is where the points went. Pulled back, with the wings and a little more space to move, this shot is definitely a high six if not a seven. It's just too cramped, and the loss of the wings denies the bird his identity. It's also very centred - either a tighter, or a looser, crop would have worked better for me.
As I said, little new but I hope that helps in some small way!