The episodic nature of a show like The Leftovers could be its downfall. Take Tommy and Laurie Garvey, the only two familiar faces in “Off Ramp”, and consider that a) we’ve seen a lot of their respective stories, from backstories to experiences at the moment of the Sudden Departure to their lives in the aftermath, and then consider b) that the episodes featuring them almost always seem like weaker entries. Why? Lost-style episodes on single characters aren’t inherently weak, and in fact “Two Boats and a Helicopter” (about Matt Jamison) and “Guest” (about his sister Nora) were two of the best episodes of the first season of Leftovers.
But Lost still had its dreaded Sun episodes, or its Shannon/Boone episodes, or a f*cking Rose & Bernard episode right in the middle of a major action arc, and that last example gets to the heart of the problem: some great characters just slow the action down. Tommy and Laurie always kind of did that in the first season, involved with their little cults of various ilks and mindsets, and we always had to cut away to get to them. Cutting away, of course, implies that the stuff we actually care about will be waiting when we get back. It’s not that Tommy or Laurie walked on screen and sucked the life out of the show, but even in their best moments the structure was such that you’d still be waiting to cut back.