My only (slight) quibble was the sudden revealing of Little Worker's wolverine genes at the end, sort of a deus ex machine.
I disagree. A deus ex machina has no warning or foreshadowing. I found this ending to flow very naturally from the many hints that were dropped along the way. We knew from the start that she has some kind of animal genes, with her glossy fur and keen sense of smell. We're told that she's comprised of 12 species, with 10% being human. We see at least 4 other creatures with unusual choices of animal genes mixed in, some of which have violent and territorial tendencies. The first gynomorph makes a particular point of detailing her 5-species pedigree (her brain is based on a mink's brain, which is in the same family as the wolverine), which I believe was for the purpose of foreshadowing the ending.
Anyway, this was a wonderful story, with memorable lines and humour, and the reading was brilliant. It's one that I plan to listen to again, for certain!