Considering I hated the "good Light" period, I feel like if they just summarized that up into a few episodes [which they could - even though it takes out a chunk of stuff, I'm sure they could 'paraphrase' it], they might be able to fit the whole thing in 37 episodes...the only problem is it'll get really rushed towards the end.
But, I feel the best thing to do would be to have two seasons - the first season could be the first two arcs, at a good rate. Then the second season could be the whole last arc, with it spanned out more.
I don't know though. I personally wouldn't care if it just stopped
, but it's all up to them.