grief is the main mode i play in zombies and lately i've been becoming bored with it. I think they need different drops from survival to make the mode more interesting. like drops that will effect the other team if you get them first. and they will last for a set time like 30 seconds.
no ammo - purchasing weapons and purchasing ammo will be disabled while this is active
weapon swap - say sniper and rpg - if your weapon is upgraded it will swap to a less quality upgraded weapon
steal points - while active you can shoot and or knife the other team to steal their points
downed - randomly down 2 of the opposing team
freeze - enemy team is frozen but can still turn in circles and shoot
flame run - when grabbed the player who grabbed it leaves behind a flaming trail that will damage anyone who runs into it