If the Bella date next episode is somehow related to the Jill storyline with Tybalt and they end up going to a date just to watch over the third Jill/Tybalt date, it's going to be one of the dumbest things ever. Like we are roughly at the halfway mark of the storyline and Bella's storyline is still dependant on the Jill storyline. It's about time DPC splits them up and maybe Jill can become more interesting and grow as a character if she interacts with more than 3 other characters.
The prologue isn't supposed to be seven chapters long and it feels like it is. MC spends what feels like forever just sorting out his living arrangements and you are just now starting to get a look into the other characters lives in depth or at least that's what it's been like on my playthrough, though I suppose I haven't been making the best choices... I can't see this ending in any sort of meaningful way in 13 more chapters, at least not unless the author forces you into a single relationship within the next 3 chapters so that you can focus exclusively on whatever character you picked? (which I think is happening) but even then... My favorite character so far is Isabella so I can understand your frustration at how little presence she seems to have in the game but that's all of them, they are all tied up in some other characters bullshit in some form or another just like real life. The author doesn't need to split Isabella and Jill up, Isabella's character needs to grow into one that has a life outside of Jill's which is going to take time considering this is Isabella, an insanely well guarded and manipulative (not judging, she seems to do it to avoid confrontation which is kinda sad...) person. Give it 3 more chapters at least because there's no way she's going to come around in one more date, especially when the Tybalt dates you are talking about is just her using you (I don't really want to word it that way, it's like she is testing you... so much testing...)