I found Ayatsuji's ark in the first season both surprising and disappointing, didn't expect it to take the turn that it did, but then they didn't fallow through with it and left a lot of questions up in the air.
I was rather hoping they'd go into that with this season, but her two episodes seemed like little more than a typical ova that doesn't really add a whole lot to the story, although at least it did progress the relationship between her and the protag.
I guess it's a bit much to expect out of just two ep...
I also kind of wonder why they changed the orders around, since in the first season Morishima's was the first ark shown.
Might have something to do with how off putting her ark was though, I remember a lot of people dropped the show early on because of it, it really was the worst of the 7 arks...