There is a difference between being arrogant and not entertaining unhelpful feedback. We have a whole chat on the discord dedicated to people submitting ideas and feedback for the game, I love to hear people's ideas and I am always open to constructive feedback - I can't do anything with "I didn't like this thing you did and I think you should do the things I do like faster". I said I didn't want to come off as rude and I meant that, but I'm not going to entertain what I perceive as unconstructive or entitled feedback. I want to be clear that I have been very open to audience suggestions for certain things, but the things I want to have control over I will have control over. I am the creator and this is my project, people support it because they enjoy what I and my team do, if we tried to do everything everyone suggested we wouldn't make anyone happy and it is our prerogative to determine what is useful and what is useless.
To answer your question, we structure updates so that we complete a focus girls entire story in one update. There is a good chance Sunny will get bonus content down the road, but significant story content no, she's done.