what I didn't like about the farm is the show was totally lacking any insight into what is going on in the rest of the world. Now that the season is over though I like the juxtiposition of the serenity of the farm and complete vulnerability they are facing now. They have no supplies at all.
I'm perfectly fine with not learning more about the outside world, and seeing everything only from the perspective of this one group. The creators have said from the beginning that this is more a show about how our characters DEAL with the zombie threat than a show about the threat itself. And I think that's totally the right approach.
Although apparently from the lastest interview in EW, the show's worldview is going to be expanded quite a bit in the third season...