I only watched their Glastonbury performance once on youtube. My sense is they (Bono) totally lost the crowd a few songs in and it was downhill from there. Due to the rain and unfamiliar surroundings (away from the comfort of the 360 stage set up) they couldn't recover. In the end they ignored the crowd and instead of projecting outwards to the crowd they tended to just look at themselves more and more as the show went on. Not a way to win a festival crowd. A very un-Bono like performance. It's probably as uncertain and as unconfident I've ever seen U2. Bono gave up.
Musically I thought it was fine.
Great points