I'd meant to watch season 2 when it aired on AMC this time, but I kept getting distracted by other things and only intermittently remembered to catch the first few episodes on demand. But today I didn't have other things to do, and I've come down with a really bad cold or something and had to spend a lot of time lying down, so I binged the rest of the season.
I think this season was really good. I love how the show explores all the different angles and complexities of its premise, with every synth having a different reaction to consciousness and with so many different human reactions to synths being in their lives. And I love how many of the key characters are female. I love it that the massive, world-changing decision in the finale was made entirely by women. That's not something you often see in fiction.
I had a couple of issues, though. When the schoolgirl who pretended to be a synth decided to go back to being human, we didn't really get an explanation of her motivation there. It was just kind of dropped. And Athena came around from vivisecting conscious synths to recognizing their humanity a bit too easily. I'd expected her arc to lead to a bigger conflict with the conscious synths, but it didn't.
I didn't see the finale as a series finale. On the contrary, I saw it as just the beginning of the next phase of the story. It introduces a new status quo whose evolution and ramifications should be fascinating to explore. And it opens the door to whole new, much more overt conflicts.
I found
one site claiming the show had been renewed for a third season, but nothing else verifying it. I gather season 2 was a hit in the UK, though, so I don't see any reason to expect a cancellation.