The mix was done by Chuck Ainlay (who's done very discrete mixes like Dire Straits Brothers in Arms and Knopfler's Sailing to Philadelphia amongst others) and in my opinion (with the caveat that there's only audience and reverbs in the rear speakers) it's about as good as a concert mixed in that style gets. You definitely feel like you're in amongst the crowd at the gigs that produced this set. If you like this music to start with, and calibrate your expectations about the mixing style there's nothing to quibble with as far as I'm concerned.
The only small downside is that despite being delivered at 24/96 on the DVD-A, spectral analysis shows a distinct 44.1kHz cutoff - I wonder if maybe there were originally just going to remix this for the CD deluxe edition and transferred the multitracks at CD resolution, and then later decided to do the SACD and DVD-A but didn't want to go through the time and expense of re-transferring all the original analog tapes. FWIW I didn't notice that it sounded "CD resolution" so maybe the people who put this set together felt like there wasn't much quality to be gained by transferring or mixing in hirez given that it's a noisy 40 year old concert recording - I know when that Yes Progeny box set of live recordings from their 1973 concert tour came out a few years ago on CD only, I asked the producer of the set Brian Kehew why they didn't release hirez digital downloads at HDTracks etc. and that was the very reason he cited, that he didn't feel the CD versions were audibly different from their original hirez master mixes.
