A lot of people have been complaining about it being boring... which I don't understand, personally. Those episodes that contain the interpersonal relationships are some of the best this series has to offer, and is what makes it stand out compared to other anime (esp. mech anime). A show isn't all about action - if you can develop character, when those characters DO get into action sequences, you'll feel for them more sincerely (for example, if one were to die or get near death).
Personally, I find the scenes without action to usually be comical, or display an interesting slice of life. All in all, this series has been one of the most amazing I've seen in a long while.
Wolf's Rain is somewhat along these lines. Eureka7 easily wins because they didn't ace the character development in Wolf's Rain.
I'm not sure whether I'd say Eureka7 is better than FMA yet, though. At the end of the series we can judge more accurately.