1.) I instiantlly fell in the love with the game after playing the demo. I love all of the characters, their voices and personalities, but my favorite character is Minami and I will always think of him as an adorable, ambitious kid.
2.) It's been a few months since I played the demo, but I don't recall any typos or bugs. If I remember correctly; I did notice the cordination of the voice and text in the "speech bubble" being a little wonky. It's probably supposed to be that way but, it's a little akward, because Rei narrates the story; you'd expect him to read some other parts besides the times he speaks. I do remember being confused about when exactly he is speaking and when he is actually narrating. So, maybe making the mono and dialouge a little more obvious would clear that confusion.
3.) The big thing was the save button and the sex and gore settings, in which you've already addressed. The graphics are phenominal and, although you're making updates to the phone, I think it would be much more effective/user-friendly if it were clarified when and how certain buttons can be used, which icons or features of the phone can be access. Maybe depending on how far along the player is in the story as well as which route they choose, could unlock certain functions or characters on the phone... Hopefully, that makes sense.
P.S.
I love this game so much, I would wait an enternity for it to be finished. That's just an hyperbole, though. XD