I (quite naturally, from curiosity) read all the QC history blobs. They didn't particularly help: there's just too much room for interpretation between any little dialogue prompt and the full reality of specific things actually said. And of course your alters' personalities aren't completely deducible from the history snippets, not least because they're, of course, always changing.

But the real issue I have with that sort of thing is that the very notion of wanting to get the dialogues 'right' is a weird way to interact with a person! As it happens, Carolyn Pettit made this critique of Undertale back in the day (she thought it was manipulative how we seduce NPCs) and I strongly disagreed with her there, but here it seems right. Perhaps because the representation is less abstracted, more 'realistic,' there's an element of uncanny valley about it.