I think Claire was part of Bane's manipulation. I don't know if it was conscious on her part at that point or not. By 50, it's clearly conscious.
My own current interpretation is that Psycho Pirate only APPEARED to cure her - a variation of #4. He gave her a temporary fix.
Batman said he was going to destroy PP's mask after I Am Bane...but clearly, he either didn't, or destroyed a fake, or a new one was made. So I think what happened in I Am Bane is deeper than meets the eye.