The single greatest improvement that could be made to the Epoch gameplay is a reputation system which simply makes the bad guys visibly identifiable, such as with a special irremovable colored mask or red nametag. This alone could greatly reduce the kill-on-sight, mindless back-and-forth Call of Duty gameplay because it would bring repercussions for playing a bad guy and cause them to be hunted. If players could visually identify the bad guys then the bad guys would become clear targets which would discourage all but the most skilled bandits (whom may actually welcome the added challenge).
A temporary bandit reputation indicator could also be given to any non-bandit player or survivor that harmed a fellow non-bandit player or survivor, which would then allow players to defend themselves against kill-on-sight newbs that still had a reputation above -5000. This temporary reputation would be lost upon death, but would allow anyone to retaliate without loss to their own humanity.
Currently the Kill Boards rarely work, probably because players often bleed out at least a little bit after being shot. And, with the ability to change character names in less than a minute there are almost no repercussions or lasting reputations to discourage players from simply killing everyone they see. There's also no way to defend oneself without becoming a bandit inadvertently.