That was my whole point. That's the Beatles, without adornment from a top producer.
It's also the Beatles without their *own* adornments, of course, deliberately going for "warts and all". (Even on their own they decided to overdub the solo on "Let It Be" back in '69, which "Naked" doesn't reflect.) They were effectively producing themselves for much of the White Album as well, so that might be a better comparison.
And yeah, I'd argue that the title track is just as much art in its "Naked" version as otherwise...
Cheers,
Jon Blum