By the way, did Gwyn refer to Zero as a he in the log?
I had the chance to keep an ear out for this as I watched, and I think the line is, "I think Zee's safe with us until we do." They've used the nickname a handful of times through the season so far, but it's susceptible to unclear pronounciation.
It really was good to get a Zero-centric episode.
The Nobodies being reckless thrill-seekers was a nice story element - I always wished Saru had gone through something similar following his vahar'ai.
I think the episode did about as well as could be expected when it comes to conveying the concept of gaining senses for the first time, and then willingly giving them up. Heady stuff for a kids' show.