You mean every new game coming from Illlusion nowadays.
Instead of working more on AA2's concept, they came up with Koikatsu which eliminated npc x npc relationships, only 1 male character, even lesser maps/zones to visit etc.
Then comes EmotionCreators which is basically a lame version of Koikatsu. Next we get A.I shoujo which resembles Artificial girl, but again with no actual improvements in terms of gameplay. And here we get HS2 which is just A.I engine, slap with HS's gameplay. Everything is just 1 step forward and few steps back.