I feel like a couple of the songs had strange mixing choices. The Catalyst is maybe one of the more obvious examples? The backing vocals are much quieter compared to the concert Front of House mix used in the tour, they only get louder in the last couple seconds of The Catalyst.
Backing vocals are also much quieter in Over Each Other (compared to the recent live vid) and partially Waiting For The End (WFTE's new live synth which Joe plays is also nearly inaudible in the instrumental break after "the hardest part of starting is ending again")
Overall, I think the songs sound great and I'm definitely nitpicking here, but I find the differences interesting.