Personally, AI, and more varied roleplay if you aim towards the teacher/are the teacherGuys, why do people prefer AA2 to this SVS? Personally, I didn't notice any differences compared to the previous game. Of course, there's nothing significant new, but well, that wouldn't make this game any worse.
I know there are limitations to mods, but from what I remember, the mod scene only really exploded with Koikatsu.
This is all just my impression; I'd like to hear from more experienced members.
Best regards.