I definitely agree that some cropping is in order. And I don't believe in an "artist's vision" - at least not in my case!(posted 8526 days ago)When I put this on my site, I'll probably retouch the upper right corner instead of cropping it (perhaps even darken it in) and I'd only crop about half as far from the left as you did. (I like both the proportions better that way and keeping the crown of the other girl's head.)
I did apply a bit of sharpening to this in Photoshop. It tightened up the line of her dress and the laugh lines around her eyes.