"This life now, you kill or you die. Or you die and you kill."
If there is one thing that desperately needs to be addressed about The Walking Dead, it is the series' tendency to just deliberately put off important plot elements in an episode. Instead, it favours pushing off these stories off to future episodes.
"Freeing that prisoner -- more important to you than Carl?"
Better Angels is probably the weakest episode of the entire series so far. It had its moments, and some of it were good, but the way it ended was just awful. The irony of Carl shooting Shane was fine.
"I hear Nebraska's nice."
From the moment Rick carried his injured son to the farm, Hershel has done nothing but good for Rick's group. He provided food, shelter, and saved Carl's life. In exchange for his generosity, Otis was killed, and Shane's loose cannon behaviour left Hershel and his family devastated.