So DK's already have their 17 second strangulate+AMS+stun lock down. Then they're fear immune with lichborne. After teleport I just get death gripped back. Of course, if I try to cast anything, they always have a short cooldown interrupt too.
Now, UH DKs are snare immune with UH runes down which is completely backwards. That just makes it easier for them train and hard as always to deal with classes already kiting them like frost mages. Think about it. When are your runes going to be down? When you're already training someone...
Plus DKs don't even have to be smart to use IBF against axe toss/shadowfury anymore. Just wait till you're stunned and removed it now.
Oh, and here's what SLAAAAAAAAAAYS me. Let's just pretend the death knight was afk or something and somehow a warlock actually gets him down to low health (God forbid this be possible). DEATH STRIKE HEALS FOR 20%. Death strike 2 times, turn those blood runes unholy, pop empower rune weapon and there's literally 100% health healing. Then if the DK goes afk again and somehow gets low again, pop lichborn and shoot death coils at yourself for 20k each to heal back up AGAIN. Fel armor just lost its healing ability and DKs get this?!!