I enjoyed it too. I liked:
The fact that June's behaviour made more sense in this episode. She seemed to have realised that she had been too cocky. She saw the Marthas hanging, Commander Lawrence humiliated her, she acknowledged that she doesn't know or understand him, and she played her cards pretty carefully in the conversation with Fred. I think it suits her better to work the "politics" (trying to persuade Serena to act for example) than randomly joining in the Martha's escape attempt.
Serena's scenes. YY to comments about her awful mother helping us to understand her a bit better. Her character development has been fascinating and I can't wait to see what she does next.
Scenes with Fred and Nick - Fred's speech was suitably awful and I liked that June was awful to Nick but then let him in (as implausible as it seems
)
Is Nick really a commander? Was June just guessing about why he was there? If he is a commander it must be a very junior one, for him to be sent to fight. Although I suppose they might want someone they trust to lead the soldiers?
I was frustrated not to see more of Emily (the reunion!) and the others in Canada but hopefully we'll get more of that in the next episode.
I agree with PPs that the plot and general quality has significantly deteriorated since departing from the books, but I do feel that episode 3 was a bit more "true" to previous episodes and more thought-provoking than episode 2.
I can see why they released all 3 at once in the US (and elsewhere I think?) as I think they work well together to set the scene for the rest of the season.