Hah, yeah, all things considered Cass is doing okay. Bette was tossed out to Limbo (no, not literally), and her only chance of coming back is probably if Kate starts getting used in more than cameos and the writers decide she needs a sidekick for the first time in years.
And since Bette barely ever gets used, but has 2 mantles that no one else is using - why not give one of her spare mantles to one of the other Batgirls. Come-up with a story reason to explain it, or not, and either of those names is way better than "Orphan".