Hello there,
nothing against your way of thinking of course as everyone has their own likes and dislikes. It is indeed a huge ask to remove the futa out of such characters, they are intended to be like that, and it would require a rework of all scenes, dialogs, and behaviors of these characters. Even though AI is used, is not a single click and it gets generated, there's is a lot of work to each pic and bust/asset after generation, some even fully manually done. The futa pill is just for Anna, not for certain characters. While I understand some people might have a liking to a character shattered because of the "extra package" is something that won't be changed, there's currently 3 interactable futas out of a cast of 40+ characters so there's something for everyone.
As for the solo/harem route, that's already in game, you can decide between sharing or not all of the characters, except for some specifics like Haniya for obvious reasons, and for anyone coming to request it... NO, there won't ever be a steal route for Haniya.
Hope that clear things out mate.