These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Fridge Logic: Why bother giving Hermats their own set of pronouns? If the pronoun in Hermat language doesn't translate, they're welcome to borrow one from a language whose pronouns are not gendered. Chinese, for example has tā, which is gendered only when written, and then only when written in the logograms 他 or 她.
Pretty sure that hir/xie and already existed as potential genderless pronouns in English before the series was written.
Holy Shit Quotient: Series average of 2 per book. That's not surprising when we consider some of the content: a giant energy being shaped like a flaming bird, which hatches out of a planet and later impregnates a starship; a one-eyed, one-horned, giant purple people eater; a woman who looks like Lwaxana Troi and Christine Chapel, and is immortal...who then dies, except that her consciousness is now inside a starship; a helmsman who regularly sleeps at his post and is part Greek god; a hermaphrodite chief engineer (hir whole species is hermaphroditic) who impregnates a Vulcan, of all people; and a book partially set inside a pocket universe that is, for all intents and purposes, a jellyfish. Basically, the series is one giant Mind Screw.