Blah Blah Blah.
Yes, U2 are on the downswing of their career - this much is obvious. But no band can continue the succession of creative brilliance witnessed during UF-JT-R&H-AB indefinitely. Just as any basketball player can catch fire and hit everything he puts up, bands can do the same thing. U2 were on fire(no pun intended) from 1984-1993 pretty much. Everything they put up went in(was brilliant). But every band, given that they stay together long enough, will eventually pass its peak. Every mountain has a downhill slope on the other side of the peak. Believe it or not, if McCartney and Lennon hadn't grown to hate each other and the Beatles had stayed together, today we might be talking about how they're just a nostalgia act and how they haven't put anything of relevance out since Let It Be way back in 69. But the Beatles did end then and so they never finished the natural progression that all long-standing pop/rock bands go through.
And the same idea goes for touring.
When a band has been around as long as U2 has, it's GOING to get a little repetative and there are GOING to be songs that just will never be permanently dropped. It's not that easy to satisfy a massive fanbase when they all agree on what should be played, let alone when one group is tired of the standards, one group is younger and wants to hear the standards for the first time in person, one group is bitching and moaning about how the 90s minus AB are being ignored, etc etc etc. And that's just the SETLIST! That doesn't even begin to mention how much complaining I'm hearing about the presentation of the tour. You know what's ironic? What's ironic is that all these people say, with regards to the tour/record, 'oh, I wish they were still adventerous and into trying new things like they used to be', yet all they are really wanting is for U2 to make records similar to the experimental ones they've already made, AB et al. If you really wanted something brand new and adventerous, you would be dreaming up something that U2 has never done before, instead of moaning about how this tour should be more like ZooTV or Popmart(which were both brilliant, btw).
And that's really the point of this...U2 in all likelyhood will never reach the platau of brilliance they inhabited in the second half of the 80s and first half of the 90s again - no band stays there forever. But just because they're not on that platau anymore doesn't mean they're at the bottom of the ocean. They are still better than the majority of the bands out there. People just need to be accepting of the possibility of U2 actually putting out something different from anything else they've put out, instead of hoping beyond hope that U2 replicates a record(s) that were different from anything else U2 had put out - in 1993.