This patch has left me torn with respect to DKs.
On the one hand, 15% more strength for Unholy and the Assist pet stance all sound lovely, since I don't really like Frost now. And tanks will get slightly more parry, which is cool.
So in PvE, I'm happy. I wouldn't be if I played Frost, but whatevs.
In PvP, none of these changes are too awesome. Increase in Unholy Might is still nice of course, but I would have preferred Dark Succor. Still, though, I tend to PvE much more than PvP...
Either way, I can't decide if I like Cata's DK. I loved the class in Wrath, but certain changes just, well, suck. A lot. And they haven't added anything I particularly like (minus Dark Transformation, which I like in theory but don't like in application). So it really depends on how much the changes bother me. And until I decide, I don't really intend to invest myself into him.
Anyways, you all are horrible, @#%^ed up people
Never underestimate the healing power of a massive dong.