Something I noticed while flipping through the latest comic issue of THE WALKING DEAD is that the living tend to be a much greater threat to Rick's group than the actual zombies. Kirkman probably intended this to be ironic, but when story after story tends to be less about humans vs. zombies and more about humans just being assholes to one another, the title of the series starts becoming a little redundant.
Look, I get it: When the system goes belly-up, most people would probably exploit a lawless world to their own ends rather than trying to re-establish civilization. This isn't anything new in the zombie genre. Hell, the group in Romero's NIGHT OF THE LIVING DEAD basically fucked themselves over because they were unable to work together as a team.
But we're not dealing with a feature film, we're dealing with a story stretched out over multiple episodes. Having selfish/desperate humans act as the antagonists chapter after chapter can become even more depressing and dreary for the player than dealing with hordes of the undead.
I'd personally like to see the next season take place further along the WD timeline, where there are almost no living humans left (at least within driving distance) aside from your little group, and the only outside menace you need to worry about is the menace responsible for the apocalypse in the first place. It would make the atmosphere twice as intense and claustrophobic, IMO - almost more like Romero's original movies than anything made after 28 DAYS LATER.
Those are my thoughts, anyway.