I recently tried slow zombies with poor vision but pinpoint hearing and found it leads to some really terrifying moments. A single zombie knocking or breaking a window can quickly spiral into a full on horde blindly swarming a building. The downside is it makes building and fighting with anything other than stealth kills a nightmare. So I was looking to mod a system where I could have the best of both worlds. For instance maybe during the day zombies are fast shamblers with normal vision and hearing, but as darkness approaches they naturally lose vision (set to poor), move a little slower (shamblers), but their hearing is increased to pinpoint.
Alternatively it could be linked to moon phases meaning the effect can be seen during the day for a few days too... but this makes less sense I guess.
Unfortunately I've not made a great deal of progress, I see references to calls such as instanceLore.Speed.getValue() and instanceLore.Sight.getValue() in the game code, and also getSandboxOptions() (https://projectzomboid.com/modding/zombie/SandboxOptions.html), but I've not had a great deal of time to dig into them.
It would be great if a dev could just say "Yes, that's possible" or "No, global zombie lore can't be changed once a game begins". Atleast then I'd know whether I was wasting my time =).