Nice composition.
Composition is interesting. Since DOF left those green leaves in focus, suggest burning them in a bit or applying selective blur ro keep them from competing with your focal object.
It's a strong composition and really life like looking colours
FWIW, my "issue" with it, is that the leaf that goes off shot at the top right corner is OOF but occupies a significant and prominent amount of the shot, it draws my eye, so I notice it's not sharp
I wonder if you have any other crop options to get it (or most of it at least) out of the frame?
In that case it is quite subtle because I did not notice any. The vignette works by pushing the viewer's eyes towards the centre of the frame by darkening the corners. I add a vignette and push it until I just notice it, and then dial it back a tiny amount. I used to use the vignette technique back in the wet darkroom days by adding a little bit of exposure to the corners of the image being projected by the enlarger.