The Lori thing hurt the episode simply because her wreck= more recovery time at the farm. They also found out from the travelers that the fort they were headed to has
been over run, so no immediate plans for the future, this = more time at the farm. I'm already sick to death of the gd farm! Also, Rick didn't just kill the two guys, it was self defense. As a cop, I don't see killing two ruthless dudes that drew on him first tarnishing his soul that much.