Coincidentally enough, I've been thinking about Sai at this stage of the game. It's probably too late to get rid of her, and not easy to succeed anyway. I don't think Joe is the only one concerned about her being on the jury. I don't know it Sai gets to the end, but if you're still in the game going forward, you probably don't want Sai getting kicked out.
OTOH, most of the outcomes since 2021 haven't really been that close, so if I'm Joe, I'd be more concerned about my future in the game before someone's future within the jury