Why the "plot armour" criticism is ridiculous
Clementine and Kenny have been frequently attacked this season - maybe Kenny more so than Clem - for their use of "plot armour", aka "plot devices in films and television shows that prevent important characters from dying or being seriously injured at dramatically inconvenient moments." (Source: Urban Dictionary).
In Clem's case, it's only partly true. Anyone could argue a little girl left alone in the midst of a zombie apocalypse should have "rightfully" died five episodes ago. The problem is, abruptly murdering Clementine would only be effective as a momentary shock. Clem has been our guide through this story since day one. Bumping her off might be considered "daring", but it would also be the equivalent of Telltale shooting themselves in the crotch (as opposed to the foot), simply because the player wouldn't want to continue the narrative with any other character, at least one who we aren't emotionally invested enough to care about.
Now...Kenny. I'm still of the opinion that Kenny's return was the highlight of season two. If you thought it subtracted from the overall quality of the season, that's fine. But to be honest, after the relentless ugly nature of the first episode, Telltale needed to cut the fans some slack. And by "fans", I mean the majority who made Kenny a popular character, myself included. Naturally Kenny will always have his haters, but let's say Kenny fell through that ice in episode 5 instead of Luke. You're the writer of the episode. Map the trajectory of the characters and their motivations from that moment on. Why would Luke get into a vicious brawl with Jane? Why would he KILL her? In terms of personality, Luke is about as far removed from Kenny as you can get. If Telltale had a planned conclusion in mind for Clementine, they eventually must have felt that Kenny and Jane's conflict would bring about that conclusion.
And then there's the player's own personal connection with Kenny. Obviously, you either love him, or hate him. Very few fans experience any sort of middle ground. Would you really have been able to say the last fight between Kenny and Jane could have been just as intense with Luke in Kenny's place? We might have gotten to know Luke well since episode 1, but let's be honest: He was always just a "nice guy". Nice guys don't simply stab women to death, certainly not in the kind of situation we saw in ep. 5.