Exactly. And I think it fits Donna too. She can help people but (usually) avoid the violence of super-crime, confront the horrors of her past that so defined her (very Batman-esque, that), and for the first time in her entire history fill a role that isn't utterly, completely redundant. She could be (mostly) unique, and while Donna Troy has been a whole lot of things over the years, unique has never been one of them.