I see both points of view, but I tend to lean on the side of those apprehensive a bit thus far, for this reason...
For those of us who have seen them perform live before, we realize that this band is one of the best live acts on the planet when "on". For them to be unrehearsed or lazy, even this early, is a little disappointing. Face facts -- look at others that are widely regarded as top-shelf concert acts (whether you like their music or not). Would Bruce Springsteen or U2 or Billy Joel or (name your favorite) with a superior live reputation be screwing up like that? No way. There's no excuse for that -- it's poor preparation, period.
I'm seeing them in a week or so, and I hope that they put some rehearsal time in and live up to the standard they created when I saw them in 2002. They were incredible.