Great job addressing the bass in the new mix.
You actually did a great job processing the vocals IMHO. I think the reason it doesn't sound 'right' is because Thom Yorke really eats his words when he sings. So here, the vocals hit the notes for the most part quite well, and are nicely processed, but I think the mere fact that we can quite easily understand the vocals makes it sound 'out of place' for a Radiohead cover. I mean, I LOVE this song and I love radiohead's music (before King of Limbs), yet I never knew that the lyrics started with "in the next world war" until I heard your mix lol. But that has nothing to do with your mix, and personally I think you did a great job with the vocals.
My one big problem that nags at me when I take a listen is the intro cello. I think it's such a key part to this song. I know you mentioned that all instruments were played live and not programmed, but for some reasons to my ears this cello doesn't sound like a real cello. It has a real organ-like quality and doesn't include the powerful vibratos of the original (at least, not to my ears), and seems to step directly from note instead of sliding and "flowing" from one note to the next. How did you process the cello? Perhaps it was a bit too processed?
Don't mean to sound harsh, because this is a FANTASTIC cover and mix, and it's impressive that you've done it all with real instruments. But if I had to pick one thing that nags at me, it's the intro cello