Two suggestions:
1. People have been saying that the explosion animation caused by grenades has resulted in more server crashes. Could we just remove the animation and go back to how it was before.
2. Add some knock back to the grenades. Now people can just throw grenades however they want now with no punishment and almost guaranteed to set zombies on fire, slowing them for 15 seconds seems kind of OP. It takes away from the art of grenade throwing.