Well, this was the second episode in a row that caused me to tear up a little, though I liked "An Obol for Charon" better.
I'm glad Culber is back as a flesh and blood human and I'm happy that the explanation for how he was brought back was a lot less "woo" than perhaps some people feared... i.e., it's kind of a relief to now know that Star Trek isn't going all mystical by treating the mycelial network like some kind of supernatural realm or actual factual afterlife, but rather, that there was a scientific basis of sorts for Hugh's continued existence.
When did May and Tilly form this deep bond? It seemed like just a couple episodes ago, Tilly couldn't wait to get rid of her.