You are incredibly ignorant. Most bands don't even change up their setlists for a whole tour so why do you expect any differently from DBS? Because LP does it? That's dumb. The setlist was the same, yes, but they did slightly different things with songs than their studio versions, which is more than some bands do anyway.
As for wasting time that could have been used creating new music... get real. They were hardly away for years. Not counting the fact that bands write new music while on tour all the time.
You strike me as one of those people that just looks for something to complain about.