Well behind the curve, and given that the level 80 Death Knights have been running amok for a week or so – the news that my Death Knight is level 70 is not huge for most. But for me its fantastic.
I’m now in Northrend, running quests, killing mobs, and learning how to scale them. I think they are better at 70 than the initial “whoa” you get at 55. The mobs are tougher and take some extra hits, and sometimes a miss or dodge will stuff my rotation; but I love it.
Deathgrip is fantastic for solo play, combine that with two Silence affects when you’re Unholy, and two anti-magic shields – casters are Toast.