While the nerf to Kill Command, making it so it no longer affects Lightning Breath or Scorpid Sting like probably a good call, it leaves the rune with a side-effect that was likely overlooked.
In its current state, Kill Command - “Give the command to kill, increasing your pet’s non-periodic damage done from Bite or Claw by 60% for 30 sec. Each special attack done by the pet reduces the damage bonus by 20%.”
The main issue is with the skill Bite, Bite has a 10 second cooldown and shares a global cooldown with other talents such as Lightning Breath and or Growl, and also requires 50 focus, so it is nearly impossible to get use of all three charges of Kill Command.
A solution for this is to make Kill Command While active reduces the cooldown of Bite to 5 seconds instead of 10, this would give your pets extra time to be able to regain energy as well as not be as affected by Global Cooldowns, and actually get use of the 3 charges.