You noticed any interactions between the girls before moving to the housing island? In my game the girls ignored each other all the time.
But maybe I missed something during the grind.
AI Girl graphics are definitely better than AG3. This is a fairly natural development in 12 years.
But if the only advantage of AI girl is better graphics, a better choice is Honey Select.
H-scenes are basically the same as in Ai Girl, but there's no annoying grind in Honey Select.
Taking into account nice graphics and free roaming, AI girl has the potential. But I doubt Illusion will use that potential. I suppose the expansion packs will bring more sex positions, some toys, but not a living world and interactions between girls.
In AG3, it was nice that the H-scenes didn't stop the world. Other girls could watch h-scenes, get aroused, run to masturbate.
I do not know why Illusion did not go this way in AI Girl and did not try to extend what was good in AG3.
AG3 if you used the cheat system, you'd see there's love/friendship/jealousy/sleep/bathroom/hunger/lewdness... 7 active statuses like the sims which caused the girls to perform interactions with the world. There were also a bunch of personalities, but they were static picked traits and had no way to improving or changing depending on how they interact with the environment.
In AI girl, I believe the statuses are Hunger/Fatigue/Lewdness/sickness... along with that there's a sizable interior system of personality stats that battle each other to create her personality and her actions. I agree that the game is buggy... ohhh it's buggy, but I wouldn't know Illusion's financial situation, someone releasing a game in a buggy state typically doesn't have the disposable income to take time, they gotta meet deadlines and hope it snags.
I seen girls finally talk to one another... but my main girl did that after her lifestyle had been dictated. Possibly the girls don't start realizing each other's existence until they have finally reached a point in their Awareness which could be the 4th level of transformation. I've seen them go out, then come back home, over and over again like they couldn't make up their mind or they couldn't get to their objective in time so they just had a command override. \o/
I don't want to bash illusion, if ya dunno what the internal struggle is to hold onto a company building, budgeting and praying to THE GAWWDS! That your hentai game company doesn't get canned because your style of games is not Triple-A Income raking tentacle beasts, and you gotta deal with non paying fans, and your main consumer base.
Things were probably much better off back then with AG3, if you want AI girl to get TLC... complaining is gonna get nothing. It's not our art to dictate how it goes, but we can support and ask them to not abandon it, but you know... holding onto a business like that and getting the proper funding to stick with a game for longer than a year... \o/ I dunno.
I'm just trying to show another side so, if you know more than I do... ... try not to flex on me too hard then xD