I am overjoyed Fiona is gone.

I agree. Moriarty had similarities in how her brain worked. Fiona is a damsel.

Kitty was also a sidekick and got more than Joan does.

He enjoys that, though, with Joan.

Would she be capable of discerning what that shit is?

I didn't like her either. It felt like reading a book that's too heavy on the interior exposition. Because she was like this she acted like this and that's why that happened blah blah blah.