That's alright, maybe we players could use some introspection, because we hype games with tons of variation and most AVNs get abandoned, while your game being linear may be a more responsible choice that allows you to finish it - I hope you do!
If I can suggest something, I think "two girls want to do an activity with MC, pick one" type choices may be a good fit for your game and prove popular! And at least I suspect I'm not the only one who likes favoritism and seeing the girl we neglect pouting and jealous haha