I enjoyed the last 4 episodes or so (from the fight at Saturn onward), I like those kinds of settings a lot, and Bell, Kureha, Hiiragi, Nightmare, and Anzelotte were cool. I'd watch a second season if they made one.
And Elis FTFF. She's like a concentration of most of the typical Mary Sue qualities all bundled up into one very un-endearing package. If they do make a second season, she need to stay on the side lines and Kureha should take over as the female lead.(I'm worried that they'd find a way to give her her powers back or giving her new ones... the coupling leaning more towards Hiiragi X Kureha at the end is a good sign, though)