If you enjoy Appice's monotonous drumming, fine. I can respect that. But you're asserting it doesn't really make any difference. It does. I find watching paint dry more exciting than part Vinnie Appice has played in the last quarter of a century. The reason this is disappointing for many is that this isn't just about live shows but the creative process of a new Black Sabbath record.
I don't want to get into an argument on the merits (or lack thereof) of Forbidden, or Seventh Star, or Fused. People will have different tastes. But you're pretending Iommi=Sabbath and that you don't get the bitching, as if everyone out there should feel anything Iommi ever played is interchangeable for everybody. Nope.