... isn't good enough!

It's a solid cosplay I'd say but the photo taken is rather boring. Front shot on eye level and looking straight at the camera makes ok results at most. Taking a photo slighty above the eyes/head makes the face a bit slimmer and accentuates the chin line. A shot from below makes it look bulkier.
The lighting makes it look kinda flat to add to it.
Photoshopion*
Does it matter if it's edited? Editing is common enough these days that you'd think people would expect it by now.
I think this cosplay is pretty, and the fact it was edited adds to it.