First, you'll notice a couple things: Some builds end up with deathcoil being bugged, which makes it cost zero RP to use. I've narrowed this issue down to putting anywhere from 1 to 5 points into either Tundra stalker or Rage of rivendare.
Second, you'll notice just how incredibly lame the random ghoul pathing can be without speccing master of ghouls. No offense, Blizzard, but I don't want to be forced to spend two talent points that I normally wouldn't take, just so that my pet doesn't fight as if it has down syndrome. Do I really need to sink those oh-so precious extra two talent points into my ghoul just so that he doesn't behave the way he does in this video? Really? Come on. So much for being a master of controlling undeath. I already think it kind of sucks that ghouls are so nearly exclusive to unholy builds, and require 8 talent points to really be effective. The extra two points needed to make them actually under your control is just a, how does it go? Oh yes: A slap in the face! :P
Finally, I think you'll see just how awesome death grip can be. If anything, it can simply be used for a last resort interrupt in both pve and pvp.
If you're wondering what spec I was during this. Here it is.
Finally, here's the video. It's not much, but I'm only now starting to bump into alliance now and then. I think I'm at a distinct advantage in many cases simply because not a lot of people understand or have really figured out how to fight against a DK yet. I seem to get the "Dear in the headlights" look 90% of the time I run into an alliance.