@Echonic
I believe he intended for Yotsuba to win when he was in the very early stages of the series. I think he gave the other quints more development because he wanted to give them their own satisfying endings, but neglected developing Yostuba because her ending would just be with Fuutaro...
So those scenes that we got in previous chapters where a character dies and they see all their loved ones around them is what the 'paradise' Bon mentions is like. However, all of the characters that we see go through this eventually realize where they are, and the illusion breaks down around...
I felt like that was coming. She is a rabbit, and it seems like "bestial instincts" are like some external force in this world, just as Lugosi was overcome by his wolf instincts. A rabbit's instinct is to breed as much as possible. What that herbivore said on the park bench was entirely true.