She was used well (along with Huntress, Dick, Tim and the late Orpheus) in one of my favorite Bat-minis ever - "Batman Family". It included the only time I've ever seen Cass in civilian gear (i.e. dress and make-up) openly as a member of Bruce's family, standing (and smiling!) with Tim, Dick, Bruce (and Babs) at a Wayne charity function at the end. It's a shame that its not available in TPB as far as I know.