This show is stupid. There's nothing worthwhile under the metaphors.
The metaphors themselves aren't particularly interesting or as skillfully employed as in other shows (e.g. the recent sitcom Man Seeking Woman). Despite being heavy handed and obvious, they mostly walk around talking like regular people and doing underwhelming stuff. So we have to turn to the show's underlying message to search for any worth. Turns out there's not much there.
They take a premise with potential for in depth exploration of society and waste it by just grinding some personal axes in petty fashion. The co-creators, Bryan Fuller and Michael Green, grew up on the west and east coasts respectively, and don't like that little strip of land between NY and LA called America. They spend the show bashing people and cultures they clearly know nothing about. That's it. That's basically all this series is. Oh, and media and technology are vaguely having a big impact on society. Gee, that's insightful.
Guns are evil. White Protestant Christians are murderous and stupid. People who support border/immigration law enforcement like every other nation on earth (in Mexico illegal immigration is a FELONY) show up and use machine guns inscribed with Bible verses to mow down innocent, saintly people crossing the border (which never happens, though illegals do come up and murder Americans all too often). Etc.. The Kentucky sequence this past episode exposed the writers' own ignorance and bigotry to such a degree that I almost felt sorry for them. The writers certainly don't know much about "bitter clingers" (as Obama infamously called them) or religion. Fuller claims he was "raised" Catholic, which hardly makes him a theologian or guarantees a mature understanding of Catholicism, let alone Christianity in general or those Heartland evangelicals he fears and views as "the other". Green is a Jewish guy from NY who probably hasn't had much interaction with actual church attending Christians.
Given the show's collapsing ratings, Starz was premature to renew it.