I very rarely recognize the recognizable guest star. And the few times I do, they end up not being the villain.
I can't decide whether or not Captain Gates not appearing half the time is a good thing or a bad thing. On the one hand, she was supposed to come and shake things up; how can she do that when she's not there. On the other hand, by skipping the obligatory "the captain checks in and sees how they're doing" bits they did when Montgomery was there (and every cop show does, for that matter), it makes the scenes where Gates actually does
appear that much more important.