I beat the game, used her a fair amount in my party. She got no scene at the end, it like went through what was going on with everyone else, nothing for her. Was pretty disappointed.
That said, she is not weak. I played her as a Druid but you could respec her to anything you want. No character can be weak or strong, as there is nothing innate about them thats specific. They are whatever class you make them and whatever gear you put on them.