Imp. Blood Presence is NOT, and never will be, a tanking talent. You use it and Scent of Blood over Subversion/Mark of Blood/Sudden Doom in a threat based tanking spec. That's not a good idea.
Your second AoE rotation doesn't make sense. The best rotation for a fast clear is DnD - Blood Boil - Icy Touch - Plague Strike - Blood Tap - Pestilence - Alternate DnD/Blood Boil. Death Striking twice is counter productive.
Death and Decay is not optimal for single target boss pulls.
Death Grip doesn't create agro, it works like a mocking blow. If anything, Death Gripping at the start of the pull puts a useful ability on cooldown for no reason. It also prevents you from sucking casters into your AoE.
Rune Strike can NOT NOT NOT NOT get parried or dodged. You make a lot of references to it needed expertise, which is 100% untrue.
Vampiric Blood is the best reactive tanking talent we have as death knights, it's counter productive to use it without necessity.
The different specs requiring different levels of gearing is a pretty large myth, especially with the UA change.