I love Claire's short hair, it looks super cute! Just thought I'd mention before we get into all this craziness.
Cons:
I mean... I don't know. This episode was pretty great. I guess my only complaint is that it's a finale and now we're left on such a cliffhanger until season seven comes along? There's so much setup happening, and we're going to have to wait to see the payoff.
I suppose along the line of more significant complaints, I think structurally this short season had some issues with pacing. While this episode in isolation did a great job, I was perhaps missing maybe one more hour of content prior to it, to pad out some of these elements. The various subplots that had to be wrapped up and set aside, the little things here and there that weren't given a ton of room to breathe.