Is there evidence that Himawari didn't know what would happen to Maya? I haven't wanted to play through those events a second time yet, so my memory is pretty fuzzy, but I thought that it could be intentional, to solidify Ayane's role in the RAS and potentially protect her from Maya. After all, Maya didn't seem very concerned with the idea that Ayane could be reset again. Of course it would be nice for us if they were on the same side, though.
Ooh, I really like the idea that the "nine" refers to TEMPLATE9, i.e. Nao. Here's some wild speculation: what if the "three more" that "makes nine" refer to "three halves" of USER4? I've written before about how USER4 might be composed of two halves (the stuff with "two of us return to form", Ami talks about herself as half of a whole, Nao's two eyes could from different halves, etc.). On the other hand, we're told in the title of one of Maya's festival events that "Three Halves Make a Whole". That's almost certainly referring to the city, but maybe it also applies to USER4.
Now we just need someone to do a detailed analysis of how "CHAIR GOD, FLARE GOD, MEET ME IN THE AIR GOD. STARE GOD, BEAR GOD, DO YOU HAVE A SPARE GOD?!" refers to six different specific gods/characters. I mean, they're probably just random rhyming words... unless?
I don't really have any evidence for it, but I like the idea that Maya narrates "Rivals (Taco Tuesday)", in which the narrator is pretty critical of Maya's attitude towards Noriko. If that's right, narrator Maya at least wants a reconciliation (or maybe remembers one from the future, idk, narrator Maya is confusing). Of course the best reason to believe that Maya narrates the event is that it would mean she calls herself Mayonnaise Macaroni.