When it comes to melee I know the hatchet is highly preferred over the crowbar. Not only it is a good melee but not to mention u can gather firewood with it, but what of the crowbar? Compared to the hatchet it is rather weaker, takes more hits to kill a zombie. What if there was a way that something like crates were randomly spawned on the map, only way to open them is by crowbar. One crate type can have somthing like food and drinks, also have a rarer military crate that contains a weapon or two with ammo for it. It seems like a tall order but it was just an idea I had. :|