Hampton Yount does a pretty dead-on Crow impression, but the new Tom Servo is more his own thing. I miss Kevin Murphy breaking into song all the time. And yes, the new Mads are terrific.
I'm looking forward to their take on The Christmas That Almost Wasn't. It'll be the first time I'll watch them riff a movie I've watched un-ironically (and thought was ridiculous even without them).
[fulll disclosure, I was a Kickstarter supporter of the new season]