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.
Blue and Orange Morality: Tom Price. We know he's a hardened criminal and habitual liar who is willing to casually murder in cold blood when he feels it's worth it, but sometimes holds back and displays some loyalty to the group. Exactly what motivates him seems unclear.
Fridge Logic: Why are characters limiting themselves to pistols and shotguns? There's entire military arsenals out there.
Since the plague played out over time the nuclear subs would have been able to monitor the progress of the plague through public broadcasts and dispatches from their command authority. Doubtless the same would have happened with the SSBN fleets of the United States, Russia and any other navy operating such submarines.
Rescued from the Scrappy Heap: Sarah spends a majority of the first season being useless at best and outright villainous at worst. But during the second season, she begins to put more effort into acting like a better member of the group.
Tear Jerker: Mickey finally giving up on his human family in Book 3, hoping that if they ever come back they'll know he waited as long as he could. Even Lucky, who hates humans, starts to change his mind about them when he realizes just how much Mickey loved his family.