I would LOVE to see a live album from this tour, but as people have said, there's so little difference between the official live releases and the studio stuff these days that it's barely worth it.
As for the audiences, here in the UK you'd think most of the crowd were at a funeral. Hammersmith has a better atmosphere than Wembley, which has none at all, but I'd love to see them play some smaller venues too, like they used to. All the footage I've seen of the Wembley show makes me glad I missed it, but I'd have loved to see that in a smaller venue, a lot of the US dates seemed to be in smaller theatres, and I imagine this worked spectacularly there.