Will things like Futa and Bondage be mandatory or optional?
Tough question. Having the ability to toggle off different areas of content isn't something that I really wanted to do myself, but enough people have asked that I also don't want to just be like "you'll get the girlpenis and you'll like it" when I know that adding those kinds of toggles is something that I totally could do.
If nothing else, it will be possible to mod out anything you don't like, even if there isn't an official in game toggle.