But somewhere up at DC, whoever was responsible for this villainisation got overruled and Teen Titans #43 gives us an explanation that allows Cass to return to the good guys' team. It's a bad explanation, which doesn't begin to cover the changes that were made to her in Robin, and it's all about abuse and mind control, but I see a lot of fans happy to accept it because it gives them Cass back.
This in turn has prompted a reaction to happy feminist fans of Batgirl that can be summed up as "Oh, so it's okay to have a story of abuse towards women when it suits you, is it?" To which the answer is "No, but this bad thing fixed something that was worse. We do not cheer the bad fix, we cheer that the worse thing is gone."
Technically speaking, Cain's occupying a refrigerator either way -- tossed off her own book and grabbed for Robin's storyline. But the TT#43 storyline gives the option to thaw which is a relief more than anything.