as i said so often, havoc is a complex solution to a simple issue (the game having become too easy for a good team due to power creep, meta weapons, more experienced players)
someone else would just have taken monstrous specialists, added brutes and large, mixed hordes (moebians, exploding heads) , perhaps limited the amount of health one can gain at med stations, made enemies tougher, and quickplayed it.
no need to reinvent the wheel with rankings and party finder when the game allegedly doesn’t have a scoreboard to avoid toxicity.