Cormier is proven, this is not debatable. Mir fight wasn't fireworks, so? Bigfoot got into the UFC before Cormier, went on to fight for the title... Daniel beat him before this. Barnett's rep is cemented, he's just returned to the UFC with a bang... Daniel dismantled him not so long ago too.
UFC is the place to be, but the time-span of these fights shouldn't be tarred by that fact. Daniel has defeated three top dogs in a row. This weekend isn't against a top dog but certainly a tough one he should beat, I'm not sure he's focused on this fight enough, and that's enough to lose.