Interesting idea, and it sounds like you like the results, so kudos.

My musical taste tends toward less produced, rougher/lo-fi recordings, e.g. Guided By Voices. So, it follows that I prefer the original recordings.

There is one aspect that I find slightly dehumanizing -- the AI changed the singer's voice so drastically that I don't recognize the original singer anymore. The uniqueness of the voice has been smoothed out to be much more generic. For me, music (and art in general) is in part an expression of one's identity, so I'd consider this a negative outcome. I'm sure similar things could be said of the instrument performances as well.

But again, this is all just my two cents, and it's a matter of taste. Ultimately if you're happy with the results, that's what matters!