Yes. This. A thousand times this.
I might see a dilemma though. If these are added into general game options, possibly in an entirely new tab, it would mean that the settings could be changed at any time. If, on the other hand, we put the various zombie toughness settings into the world settings, then any regrettable choices cannot be reversed without creating a new world, or resetting the world (I wouldn’t know).
Do we want to allow the (pansy) players to tweak down their settings or do we want them to live with their choices? Cata may be about freedom but it’s also a roguelike.
I would only allow tweaking the zombie settings - HP, speed, attack damage, possibly hearing range, vision range and other senses. Maybe check how Project Zomboid does this. We would have to be careful with each setting, as giving hulks 100% attack strength might mean instakill. The allowed range should be conservative at first. Each setting’s extremes would have to be considered to avoid inadvertent tragic choices.