1. I suggest adding noise when stepping on twigs to give a better emotion in having to dodge even in stealth mode, also to warn us of possible zombies.   2.  Dig a hole funeral to bury dead zombies or players inside.   3. Construct wormwood to discard spoiled food and make earthworm humus.   4. I would also like to hunt my friends or enemies in multiplayer mode after death (controlling the zombie), it would be exciting.