I think this was my favourite issue in this run so far: the narrative was relatively straightforward and the Threshold's backstory seems interesting so far, especially with that Arkea/Sublime final twist.
Am I the only one noticing how much the current X-Men era owes to the early naughties Battlestar Galactica reboot? An ancient civilization where humans and mutants/cylons lived together in prosperity, only to vanish without a trace? Orlando even explicitly mentions "the final three" in this issue! Resurrection technology with people emerging from goo? All this happened before and will happen again as per Moira/Caprica Six? I can clearly see all the parallels.