I tell you it all comes down to Lucas. If Lucas writes better parts and better lines and then directs with some passion then the actors would rise to meet the occasion. You can't expect them to overcome Lucas' shortcomings as both a writer and a director.
She is gorgeous and I could care less how good of an actor she is. I just want to look at her. That being said, she is not that good an actor. I thought Hayden was not too good either, he was so over emotional in some scenes that in the end I could not find him believable.