Well, the last scene wasn't that shocking but the one before that was quite cliffhangery and did not get resolved! I don't doubt
Juliette lives (tm), and probably
too, but I'm not sure how and in which condition for the latter.
The finale was great, maybe with the exception of the somewhat clunky reveal that Solo happened to know about the Safeguard (and thus Russell apparently found out before the end, much like Lukas did). It was a subtle point though that it entirely tracks with the dialogue between Silo17's sheriff and his wife: "did you think he was lying?". I always thought it was a mistake in the dialogue, as the impression given was that Russell talked to them about the environment (presumably telling them it was not safe, despite
Ron Tucker lives(tm). But apparently it was about the safeguard, in which case he told them he had disabled it (or believed he did).