make weapon spawns random (not in the same places with exception to army barracks)
more loot in other towns to make it worth visiting other places
more spawn locations (nothing wrong with original spawns)
Add random dead survivors in buildings, a dead corpse (maybe holding a gun,m4, pistol,food ETC)
put gun safes/safe in general containing antibiotics things of value etc in random buildings that require a crowbar or fire axe etc to open
make some house doors,garages,sheds locked and required to break in, and in these there maybe loot of more value.
basically make it a fair challenge not a spawn race