I thought the second season was even better than the first.
Though there was a noticable change of style. I think the biggest problem for the show is that Mireille Enos cannot uphold the high acting standard Peter Krause or Sonya Walger set. They are simply far more talented than she is and since Enos is the female lead that isn't a good thing at all, being outshone by supporting characters (Walger, Torres).
Still, I hope for another season - and an appearance of one certain Ms Graham would be the cherry on top.