Appreciate the feedback but I disagree with pretty much everything in this post.
What you call a problem, I call a solution. The side characters are only there for sex scenes until we get to the good stuff. If this game was in chapters, v0.05 would be the end of the prologue. We're still in the getting to know the characters phase. You won't be seeing most of the side chicks again.
To me, incest isn't incest if it happens fast. That's just two people that are related that decide to fuck. I fucked my cousin a very long time ago, I don't really consider that incest, there was nothing taboo about it, it didn't feel good but wrong. It was just two teenagers fucking. Not something I would make a game about.
Incest is a bit like Ross and Rachel from Friends, takes a while and there's a lot of obstacles but in the end, it pays off. The longer the fuse, the bigger the bang. If you just want a quick mommy fuck, there's hundreds of games like that out there. Mommy catches you jerking off and falls in love with your dick, 2 days later she's carrying your baby.
Most of what you want is coming. This is a long term, extra slow burn game (Hence the side characters).
The script won't be "cleaned", it's going exactly how I want it to.
If you want to change 70% of the game, chances are this isn't the game for you. Sounds like you'd be better off moving on or waiting till the game is completed.
It's starting to transition from side chicks to main chicks. V0.06 has no new characters (I think) and 2 sex scenes, though one of them is an already introduced side chick. There's also the first minor scene with a main main girl.
There will still be side chicks introduced from time to time, but they'll usually contribute to a main girls route. There's 2 or 3 side chicks and a main chick left to introduce.