I love a lot of the ideas being experimented with in this book. Some of them feel a little rough around the edges and I think the roughest edge in the book is probably The Hive. I'll try and say why I think that is.
The Hive's rules seem to be at odds with the notes about the hive. Something about people entering a hive-mind "explicitly consensually" only to have their bodies used as fodder by The Hive seems kinda bad. The narrative that people are voluntarily joining this entity only to have their physical bodies treated as expendable resources sort of calls into question how informed this "explicit consent" really was.
Also, more nitpicky but the amount of work to recover a tick on the body clock seems way more costly than recovering the equivalent amount of stress which would be done in a Downtime Action. Given how this spending of bodies seems to be the Hive's bread and butter, I think it could mean that the Hive is mechanically far weaker than other playbooks, in this supplement and outside it. If I had to offer a solution I'd probably suggest de-emphasising the body-spending part and making it more of a last resort that the player can use, so it stays costly but it might be just what the player needs to avoid a scar.
Sorry to put this here. I do not know where else to put feedback for this game. I hope it was constructive.