Overall I really liked it. The teen cast seems to be gelling really well together, and I like that Scott now has a pack that's acting as a mostly cohesive unit rather than everone being scattered and doing their own thing. Also, Kate and the Calaveras are more promising antagonists (and not necessarily villains in the latter case) to me than the Nogitsune and silent, faceless Japanese demons.
My impression is that Peter has been making himself scarce since his resurrection. It's possible the Calaveras still thought he was dead until they caught him along with Derek last season. The things I find nitpicky about the situation are them scooping Kate up and never informing Chris or Gerard that she's still alive/a murderous shapeshifting threat, and that they know so much about Lydia and Kira when those two have only recently learned about themselves.
Another thing I'm wondering, if an alpha's claws were enough to turn Kate despite her apparently fatal neck boo-boo, how is it that Braeden doesn't seem to be a were-creature after surviving being carved up by five alphas? Did Morell or another emissary do something magic to keep her from being infected?