I'm not sure you will see a mainstream slow movie zombie movie again. General audiences these days fail to enjoy (in my opinion) a slow sense of dread from a horror movie, they want fast paced, cheap screams that will all be wrapped up in a nice bow by the end of the film. While I agree that personally i find it more effective and in turn scarier to give the protagonists a sense of hope (false even) and for them to come to the conclusion that over time that there really isn't any, its far easier to try to draw excitement out of hordes of super human zombies like DoTD, WWZ, because then the protagonists can be throwaway generic and their arc's and acting can be horse shit and it makes little difference.
One of my friends who I would lump into general audiences, abhors The Walking Dead, and while I also think that show is total horseshit she came to that conclusion in a different way. For her it wasn't the acting, pacing, story, plot holes or any of it, it was the fact that she couldn't grasp that the show isn't (or well isn't supposed to be) mostly about dead, it supposed to be driven by the characters and all she wanted was fast paced excitement.
Really I think 28 days later was the only film to get it right in a middle ground, and that type of a movie is very rare.
The original was a very transparent allegory about rampant consumerism and waste, in that even when turned into mindless drones whats left of their conscious minds is drawn to consume consumer goods hence heading to the mall in the first place. The characters were merely there to play the part of driving the message.