You cut her hand off. First thing I noticed. If you were shooting for a customer (almost anyone, but a bad memory of a ballet photoshoot comes to mind for me) they would ask you why you wanted to portray the woman as an amputee. If you don't want someone to notice this, then you have to crop it much tighter.
Colors are very cold and frigid, which is fine, except it doesn't go with the outfit. Adjust the white balance if you want to change that. You may like it, though. It depends on the customer again, of course.
The picture is crooked, so it needs to be straightened before doing anything with it. I've seen a few "pro" wedding photographers who thought it was cool to shoot crooked photos. Never heard of anyone else that agreed with them. The subject can be slanted, mountains, trees, whatever, but the photo itself doesn't have that privilege. Of course, there are always things that break the rules. At minimum, the rule applies with the exception of subjects that are so dominant that anything wrong with the rest of the photo actually strengthens the dominance of the subject. Some skateboarding stunts come to mind.
Your photo looks like one that someone took with a fancy new camera, amazing to the person who takes a photo like that and hasn't done it thousands of times before. But when you have equipment that takes you to a new level, your own standards have to be raised as well. Photographers who've been doing it even longer than me tell me that when they see their own photographs, they can only think of criticisms, things that would have made it better. They can't look at a photo and think it's perfect.
That being said, it's a nice, eye-catching shot with a very beautiful setting and subject.
