OK first of all unpopular opinion time, I love this show, LOVE IT. I will also say that most of my family and friends love it as well. I will specify that all of us save a friend who lives in Jersey live in Wyoming, Colorado, Nebraska, Kansas, Oklahoma and Texas, so maybe that's part of the reason for the love.
As for the last two episodes that was so intense. The buildup to the season finale is killing me. I don't hate any of the main characters outside of Kacey's wife, her holier-than-thou attitude grates big time.
As to the issue with Jamie, if you are watching the behind the episode videos they have said that they will reveal just exactly what Jamie did in due course. I'm beyond happy with the show getting picked up for next summer.