I sadly lost interest in this game. When they "nerfed" the boob scrolls in Book 1, that was the first blow. I'm not a fan of large boobs, and even the small boob scroll has very large boobs compared to her old model (2nd to last image in the OP). These scrolls were 100% optional and preference based, so it's a slap in the face to use a small boob scroll and still see D cups tits. I'm not asking for flat (which basically is what the old model was), but a small B cup would have been nice. The 2 other main characters in book one, who also have smaller busts, don't even show them after all the grind. They both have only 1 halfway clothed CG scene. Too much of a tease for me for all that work.
Then the 2nd book didn't even add boob scrolls. I supported this game because I thought the creator was being unique and giving everyone an option for their preference, but now it's just like all the other games where every girl has big tits. It gets boring for me seeing the same bust on every girl. I'm officially tired of big boobs it seems.
Book 3/4 will involve characters from the series with even smaller busts, and I've never agreed with changing bust size on canon characters appearances which i'm positive he is going to do. It makes them lose all appeal for me. I really wish he would have stuck with canon appearances, or at least kept scrolls in the game to allow us to customize them.