They probably won't come around until legally forced to, or it becomes a bigger PR
problem than it currently is. I personally didn't think any cruise line should have charged paid in full bookings to start with. They covered themselves well in the documentation concerning the possibility of the charges being imposed though.
The longer they go without doing it voluntarily works in their favor. As the paid in full bookings that were charged will fade. Just my humble opinion in answering the original question.