actually kinda wanted to pin down why I enjoy the post split (although I also watched all of bfb in one sitting which might effect this) but basically four is kind of on a character trajectory from even before the split, where he softens the way he treats the contestants (ever so slightly), and after he's brought Back also recovers whenever asked (which he was stubborn about before)
The change is sorta brought out because he acknowledges that the contestants brought him back themselves, it means they were Thinking of him enough to want him back; even if it was because they ultimately needed him back for recovering
And as the show progresses there are all of these little hints showing Four's gradual attachment to everyone.
And this continues post-split. And it's shown that he sees X being apart of bfb, the 'spirit of it' meaning they probably always intended to have X around as a co-host, but when he pushes them away in a heat of the moment, realizes just how important X is to the entire show.
So actually I think a lot of what I like about it is that every episode contains a little bit of fleshing out/characterization/character relationship building for four. like even if it's just a CRUMB, I enjoy it. so like an example would be Lollipop throwing the halloween party for four and doing the Scribble girl costume and like, later four scribbles on his face and tries to match with her, lmao
it's really funny sbfjf but it shows that four has grown little fond of them, and I think the fact that they stayed after the split also contributed to that growing attachment.
SO. It's very fun to watch for me, especially how four interacts with everyone and X.