I suggest an inversion of your "zombies investigate light" feature expanding on the "other mobs don't investigate light", being that mobs struggle to see players and entities in the light. This way prioritizing light source blocks as defensive mechanisms against the hordes of mobs and avoid light if they do not have a player in line of sight. This would likely be great for horror style modpacks as this feature does not exist in any other mod.

I'm playing 1.19.2