For me personally it's anything but a disappointment, personally for me Joey always was and will be the voice of anthrax. I saw 3 shows on the reunion tour and loved every second of it. Joey still has a great voice and there's no denying that. John also has a great voice but IMO his reach is far too limited to really be able to sing the older ANTHRAX cuts which happen to be my favourites. I saw ANTHRAX about 4-5 times with John Bush live and they were decent, but nothing more and they were down to playing 400-600 capacity clubs on the WCFYA tour (and some weren't even sold out!). Which is propbably why they started the reunion in the first place. At least here in Europe they played 1.500-2.000 capacity places again.
I agree Scott and Charlie have not treated John or Joey very well, they have shown themselves really oppertunist. there's definately not very much integrity left but I'd still go and see the classic line up lpay just because I love the music (and I also think SOWN was pretty good, saw them play on that tour)