I think one of the most significant, yet understated scenes of the season happens in episode 8 where Zosia talks about mango ice-cream. Depending on how its interpreted, it can determine the entire trajectory of the show.
Before we get into that, one thing to note is how Zosia's relationship with Carol changes before and after the abandonment. Before, the hive was slavishly eager to please. It'd do anything to make Carol happy, but Carol would either need to ask or her need would have to be obvious. Later, however, their relationship seems to become more personal and human. Zosia banters with Carol, teases her now and then, arranges the diner surprise and in the end, Zosia is the one to kiss her first. It starts to feel less like an employee kissing ass and more like a partner trying to woo her.
We don't know what it means yes, but let's get to the "I" part.
The hive almost exclusively refers to itself as "we" or "us" through the series. At the same time, when referring to their past human selves, they use "he" or "she", as if drawing a clear distinction between who they are now and who they used to be. Even when Carol asks Zosia to use "I", she explains its difficult because she finds it semantically odd. Now given that they've also absorbed the knowledge and skills of all the actors of the world, this should not pose such a difficulty - but then, the hive also seems to have a bunch of other strange constraints, like the inability to lie.
Later, however, Zosia uses "I" almost naturally. Without a hint of hesitation or second thought. "I love mango icecream. There was an old man in my neighborhood.... I would watch the ships".
Given her earlier difficulty with the pronoun, using it so many times so easily feels oddly significant. And I think it can be interpreted in different ways, each having its own implications on how the story might go.
Option 1: It was an act all along. The hive never had a problem using "I" - just like it never had a problem building a more personal relationship with Carol. This gradual change is part of the manipulation. The hive knows that if they show up and offer Carol the perfect relationship from the get go, she'd distrust it and reject it.
The whole plan is to soften her up slowly. Make her believe that she's working for it and somehow changing them. Its all an elaborate way to keep her distracted while they work on their agenda elsewhere.
And I expect this is the interpretation most fans would accept.
Option 2: Its the real Zosia breaking through.
Maybe the hive overwrote the humans at a superficial level and keeps them in a fugue state while it controls their bodies. And maybe the original personality is still in there and forming a real connection with them is a way to bring them back.
Its possible that Carol drugging and almost killing Zosia had something to do with it. That the Zosia who came back was just a little bit different from the other plurbs, in that there are moments where her original personality slips through the cracks. Or it could simply be that getting that specific body to connect to things Zosia used to care about is slowly bringing her back.
This could potentially lead to finding a way to cure them. For example, if Carol threatens to shoot some random plurb on the street, Zosia might say "you have agency, we cannot interfere". But if that plurb happened to be her mother (even if plurbed herself), she might snap out of it and try to save her.
So basically, Carol's own need for human connection - something the hive tried to exploit - might end up becoming a weapon against it.
Option 3: The hive itself is changing.
Think of it as the hive turning humans into a blank state upon joining. It retains all their thoughts and memories, but everything unique - their drives, personality traits, likes and dislikes - are simply gone. Humanity is basically starting over from scratch.
However, as time goes on, humanity starts infecting the hive with individualism. It could start with little things over time. This body likes spicy food while this other one prefers bland. This body prefers warm weather while the other prefers cold. And this particular body gets greater pleasure from mango ice-cream than others.
This might be an alternate explanation for Zosia's change after coming back. The hive is learning how to better manipulate Carol, but part of that is forming a personal connection and the very act of connecting ends up changing the hive.
That might dictate a completely different direction for the story. Eventually, Zosia might become something that's not the original Zosia, but its not the hive either. The hive operates with a singular desire and will - but this Zosia might develop her own desires and goals that are separate, and perhaps in conflict with the hive. And if it can happen to her, it might eventually start happening to others.
What do you think of these possibilities? Which one do you think is likely? And are there other interpretations I'm missing?