Was it confirmed that its a new writer/dev working on this VN? from what I'm seeing few pages in, looks like sissyfication/tans content are forced? If so, this is not the VN I played and enjoyed before. Maybe make a new game and leave this vn be?
I don't think the sissy/trans content is forced. There are seemingly some differences when it comes to James though depending on previous choices.
I didn't do any extensive testing but my understand is that no matter what you do James will be transformed into Ava, though the transformation will differ depending on previous choices. If you pick to go for a pure harem then Ava will be fully transformed into a woman at this point you are then given the option to let Hanna have a girl on girl test run on her before the MC comes and fucks both Hanna + Ava or the MC can pick to only sleep with Ava or reject Ava (this will be a trigger for reject no dick Ava implying you can change her further maybe?). However if you have done sharing previously then James will be transformed into Ava but he will become a futanari/trans then the MC is given the choice to take Ava, share her with the grandpa or reject her (again I believe if you reject her you get a flag for reject dick Ava implying that maybe you can change her in the future?).
Seeing as there is seemingly so much impregnation in the game I believe that James was fully transformed into a woman so that Ava can get pregnant later on. But still you can from my understanding just outright reject Ava for now and there might be future scenes with Ava anyway but for now it's kinda unclear if the gender bender part will stick around a lot or not but at least it's optional, though it's kinda funny if the MC will turn all his male rivals into girls and impregnate them