Feels like a lot of retread material, like we're stuck on the same ride over and over. The plot points themselves were slightly original, but the dialogue and execution were pretty mediocre. That said, there were a few surprising moments and I don't know why I liked this at all, but I didn't dislike the whole thing. Somehow when the military guys start taking control, I actually got a little inspired. And the Christmas story was actually decent.
I think what felt so clangy was the pastiche of zombie story with the redemption story, or the zombie story with the revenge/family story. I'm afraid that each of the core storylines would've been better without the pedestrian zombie distraction.
This, from a guy who's loved nearly every zombie movie he's ever seen.