Tons of small details in this episode to give so much weight to every single line of dialogue, from the costume design to the ethereal nature of everywhere. What a gift this was to everyone who has seen it all up to this point.
The most interesting thing I caught wasn't dialogue, but in the droids/helmets intro. Red and blue lights crossing the gallery, all appropriate to their side of the fight; all except Sabine at the very last, whose helmet is crossed by red. Maybe just a sign of her most recent choice, or maybe the direction of her arc to come? Either way, it's the only plot point of Sabine's we got this episode.