I know this album inside out and I have to agree with all of your observations, with one possible exception. I always thought that SW's aim was to keep his mix as close as possible to the spirit and character of the original, rather than as close as possible to the original mix itself.
What does that even mean? Whereas with the original mix you have an objective standard, who decides what the 'spirit and character' are?
Whenever I've been disappointed with SW's Yes mixes, it's been exactly because he's changed the original mix in a way that's to my ears less good that Offord's original choice. And as a result, the 'spirit and character' suffer.
I'm thoroughly familiar with Tales, ridiculously so maybe, but that said, but still looking forward to listening to the new 5.1 mix in the next day or two. (I'm decidedly uninterested in the 2.0 remixes, for the Offord-era stuff. Going for the One and Tormato could use some help there, though)
(I've also got the the new KC 'Beat and "Three of a Perfect Pair" to plow through..an embarrassment of riches)