Warrior's Vengeance
Maybe they changed it, but when a warrior gets up with 3 from downed state 5 without that 5 secs of invulnerability they would just immidiately be dead. My necro has 21k hp and 3k toughness or so, i got revived from down state, only to be immidiately put back in it before i could get a single spell off. Without that invuln the warrior would pretty much just be pressing the suicide button with 3.
~Lone Shadow~