Hmm, interesting that you mention that. I never heard or read a word of negative feedback about the audio, everybody seemed to be crazy about how it sounds. But perhaps I overlooked / ignored the negative reviews? My personal impression is, it's very good. On reflection, the band does feel a bit removed from the listener, like there's some space between you and them, but it's not detrimental to the experience.
The audience and music are very clearly separated and well-balanced in my opinion and neither really overpowers the other. It was mixed by the same chap who did Brothers in Arms and he took care to place instruments in the rears, giving you a nice immersive experience.
On a personal note... The quiet parts in "Love over Gold" and "Telegraph Road" are among the best live moments in my music collection, especially because of the audience reactions. The 5.1 mix augments that experience very well.
Regarding the video... Yeah, let's not talk about that.
I never watch the BluRay anyway. I'm in for the music, so just listen to the FLACs I ripped from it