Alan's right: the zombies have lost their threat. I suppose, though, if everything was just focused on them being the only danger, the script would have worn thin ages ago. It would make sense for certain individuals to be veteran zombie dispatchers by now, but I think what we really need to see more of is immense numbers of them. We only saw a glimpse of a massive herd on the road in one of the previous seasons, and the one that spilled out of the quarry and eventually attacked Alexandria, and even then it wasn't much of a threat once everyone grew a set of balls and took them on. I personally think the show should be on its last legs now as far as coming to an eventual end. There's only so much that can be done at this stage.