Having seen Mastodon six times now, I feel I should apologize for their setlist if this was your first time seeing them. I'm a die-hard fan, but their reliance on Hunter material dropped the energy immensely.
As for the vocals; they've improved slightly, but they still sound pretty much the same. Their harmonies are actually pretty decent when they want them to be. Brent's whistling solo during Bedazzled Fingernails is pretty fun, though.