I found the sound on the commentaries to be iffy. I could the folks up front alright, but if somebody came in later, it seems they weren't given a microphone. Although, they're still gems on the DVDs.
I keep hoping Grimm will hire Riesgraf to be another Grimm in Portland, not necessarily family of Nick's. A stranger. A traditional, chop-their-heads-off Grimm. She'd be fan-damn-tastic at it.