Maybe we're seeing one of those examples where great bands, due to factors known only within the inner circle, start to decline and lose at least some credibility among the fans? Ignoring age, being stubborn when it isn't needed, being too prideful, lacking self-awareness, etc. Or simply not giving a damn - that'll do it too - and just going through the motions.
I mean, Bruce might be very involved in choosing the setlist, visuals, comics, etc., but he sort of seems to have forgotten that, first and foremost, he's the singer of a very demanding repertoire, and perhaps treats his own abilities as a given.
I'm not trying to diss them too strongly. I don't know shit about their internal work ethic, etc. - I'm just throwing some thoughts out there.