I mean it, buff unholy. Death strike is a joke; Our ghouls aren't out all the time, isn't a death knight supposed to be a commander of the undead? One ghoul that's up 20% of the time, seriously?
Buff army of the dead, make it lasts at least 20 seconds longer. What more.. Give us more necromantic magical abilities that aren't too dependant on spell damage. Increase shadow of death duration.. Buff the minion durations. etc.