I apologize for the derail, but , since I had an actual conversation with the mixing engineer I thought it'd contribute to the thread and make it a bit clearer as to why it wound up like that (even if it is "speculation", according to you , but it's logical that someone like JJ would NOT have done that on purpose).
As it , is, I already voted and mentioned that JJ's mix "recaptured" the "darkness" of the original mix, which was totally lost (and I'm not saying it's a bad thing!) in the Kellogg mix-and as I always say, it's always great to have yet another "take" on such a seminal album, especially since all the reviews just concentrate on the "bass solo" part and ignore the rest for the most part.
It's not just the 'bass solo' part. The mix of Emerson's organ solo in the 3rd Impression is also a complete botch, it sounds like some sort of crossfaded mashup of different takes. And overall, levels are inconsistent across the album.
I don't know if Jakko is responsible. The 'Greg Lake did it' theory is not credible, especially as his vocals suffer in the mix too (and he was very precious about his vocals) and it makes no sense that he would 'target' just one track. I don't know who's responsible ( I would assume whoever is credited as the *producer* of the set). But clearly somewhere along the line quality control went AWOL on this release.