But...it told, as far as I could tell, a self-contained story, which played out over its thirteen episodes, came to a dramatically satisfying conclusion (and killed off several of the main characters doing so), and didn't really seem to be crying out for a second season (although the very closing scene kind of had "sequel bait" written all over it. But then so did the closing scene of Crisis...).
Nevertheless, it's been renewed for a second season. Be interesting to see where they can take it from here.
(Also? Whenever I see creator Mickey Fisher's name, I instantly think of comedian and Mock the Week regular Micky Flanagan. Which is wrong of me, I know...)