Ckyman has advised pretty well what I was gonna respond so I wont go over it again.
As explained, no character other than Anna is an obligatory interaction. And as per "So a player might infer from reading that, that hey, I can have my own harem! No sharing! No weird shit! Yeah!!", the player can have this, no share is obligatory either, if you want every girl to be just for Mc, you can, exept for examples like I already explained like Haniya.
I'm not taking your attitude as rude, but thinking that doing those changes are easy work is just incorrect.
As per the steam release, yes, is not going to be in that time, and the tags will be added.
Kal is fine with modding, theres even some that already modded a non futa version of Phoenix's sprite. And while you might be right that "the comment won't be anything new", is something that will stay like it is, Futas will continue to be only futa and River will continue to be the femboy he is.
Again, nothing wrong with the opinion of not being into futa, but this changes won't be made.