On my copy of the tape, program 1 sounds fine (like your typical Columbia Q8), but program 2 is completely unlistenable. It sounds muffled, almost like AM radio. I guess there was a 'bad batch'? I later found a conversion where the program 2 tracks sounded fine, so I guess they weren't all like that.
I will admit though, I was pretty bummed the first time I heard the quad mix in discrete form - as you say, it's very much not your typical 'Columbia Q8' mix - but now that a high-resolution version is available, I think it is due a reappraisal. And I guess the rumors about there being an unreleased quad mix of
Nexus weren't true
The real excitement for me is the BS&T two-fer. I really like both albums and the quad mixes are incredible - much better than the earlier BS&T quads. Highlights include the 11-minute "Mirror Image Suite" and an epic cover of "Ride Captain Ride".