Hey so I have a new theory that will probably last two days before Society of the Blind Eye airs but I will post it anyway.
So in Sock Opera Bill said it was so long since he inhabited a body, and two eyes was a luxury. We know that Lazy Susan is important somehow (as evidenced by the Blind Eye previews we've been seeing). Maybe Bill once inhabited Lazy Susan. She looks about sixty years old, so maybe Bill possessed her when she was a kid. She only has one eye, after all. It would explain why Susan seems so off. What do you think?