Well, the movement rules makes it a bit random whether your are able to move into combat or not, and if you would have to 'declare a charge' - like in many systems, you'd often end up short of the target.
I think the survivors have plenty of edge, especially as the Zeds move in a somewhat random manner (I'm going to use some kind of direction template instead of moving in the direction of the die, though, probably using a second die determining that).