AMC's Rubicon - TV Review

I have this on my DVR, and I watched two episodes, and I'm wondering if this is going to pay off. It's remarkably unsentimental about its characters. There is no expository dialogue; it's as though we're eavesdropping on morose code-breakers at the CIA and all their dialogue is in the natural short-hand you can have with co-workers you've known for years. So far it's dense and joyless and I'm just wondering if it'll be worth the time investment.