I feel like you should make more items featuring new properties. For example, Gorgon's Head, where if you happen to be within it's eyesight, you are immediatly petrified, or maybe the exorcist cross, where if you hit a animated corpse with it, it falls to the ground and dies.
As a longtime player of this (I used to play it without an account) fan of MAD2, I would first like to say, thank you for an amazing childhood. Now, an idea I would find interesting is in lingering liquids. For example, if you spawn in water, you could pile it up to make a bucket of water, or if you spawned in lava, it could linger, and you could incinerate your doll in it. And you can set the time it is present. For example, lava will stay in an area for X seconds, before it hardens and becomes coal (or obsidian, idk). Water will stay in the area, before it evaporates.
An idea that I have for the game. You know how you made mods for the comment drone, that changed their personality? Maybe you could make a mod for all of the other drones, so that they can turn against each other, fight each other, and not target humans.
 "Mutilate-a-Doll 2"){kind=icon}
 "Sieger: Level Pack"){kind=icon}
 "Magnetized"){kind=icon}