Looking at setlist.fm, it confirmed what I thought, they were pretty much nothing but an arena and amphitheater band. Nothing but big arena's and outdoor venues. Not sure this would pull that, but who knows. Yes, the brothers aren't there but the voice is and from what I have heard recently, Phil sounds pretty good.
I do wonder if Phil and Rex can tour under the name. I would venture a guess that the brothers wives or something like that might own the trademark. Not really sure how that all played out. I could see a lawsuit or cease and desist story coming out if this is verified.
Anyway, with all of these other bands out there touring with members you can't even name, the fact that they have 2 and one is the voice, I don't buy the "it's not Pantera" argument. I could name so many bands right now and use that same argument based on the criteria of the Abbott's not being there.
I never had the chance to see them. I would consider seeing this especially if Zakk and Charlie were involved.