I'm going to be very unpopular here (as this is also my first post) but I gave this a 6. And I'll explain why.
This entire mix struck me as a stereo mix with some enhancement. there's not nearly as much use of 5.1 as a surround mix should. I was halfway through the album when i realised that it felt like the mix was primarily for the left and right speakers, especially since the complete avoidance of using the centre channel throughout. Every vocal track is mixed to the left and right, so the centre channel really is nothing more than filler of the band mix.
The there's the LFE channel, which is the lowest in signal I have ever seen in any surround mix. I'm baffled as to why it only has a minimum if kick drum and bass guitar, only starting to show a presence during some of the lower keyboard synth parts. I ended up ripping the album as multichannel wav files just to boost the LFE channel, and I had to do that 22db. So the level the LFE would need to be for this to sound more balanced would absolutely destroy the sub if any other album was played.
And finally, this is a surround mix, so why is Pigs On The Wing (both parts) only in stereo? No slight presence in any other speakers, not even a slight reverb to give the sound a bit of body for surround. Nope, stereo only. Even if it was only recorded through 2 mics and all done live, that doesn't mean they couldn't sum a centre channel and room reverb for the rear speakers.
I'm going to add pics of each track as it comes off the disc (unaltered). I'm hoping that this could be a bad disc issue (someone else mentioned similar though) but I'm curious to see any other transfers to see if the levels are similar.