I wasn't in love with the first episode, either, despite the conflicts I saw being set up, but I thought last night's espisode was a step up. Noah Emmerich's character (FBI Agent next door) is going to be the key figure driving the conflict in the show, and I like what they're doing with him so far. With last night's ep. they really set him up as a smart, worthy opponent.
It's a nice twist to see the wife as the hard core true believer and the husband being the compassionate one more concerned with family over country.
Ultimately, this may not be for everyone. If you're doing an espionage, and going for realism, then it's going to come off a muted procedural-type drama where you get into the technical minuta of true trade-craft, and the tension is in the way conflicts are resolved in the quiet moments vs. with gun shots. The final scene of the first ep. is a perfect example. It's like a John le Carre novel vs. James Bond-style action.
This seems to be going for the John le Carre approach.