In fiction (and Pizzalotto emerges from that realm), the plot must serve the characters; so the plot does matter, but only in so much as it reveals about the people involved in the narrative. The characters in the first Matrix sucked too, but the plot was so bold that it hardly mattered that the characters were tokenistic ("Neo" for godsakes). The sequels failed because they lacked both a story a tell and credible characters (I couldn't even watch them). As great as Marty and Rust were, having them for a second season may have tuned in viewers, but wouldn't have been good for the show, as they already had their denouement; the narrative covered 20 years of their lives. I didn't see a realistic way to resolve the Tuttle situation without having even more Law and Order type episodes. In my opinion, had it resolved much more than it did, it would have been far too cute and neat, and lose it's sense of authenticity. I don't see the Deus ex Machina at all, really/