the recent death knight changes

I think this is a good opportunity to clarify our intentions regarding some of the recent death knight changes.

Going from 4.0.3 to 4.0.6, our goal was to lower Unholy death knight damage and raise mobility. Our 4.0.6 changes didn’t quite hit the mark (we undershot on damage and overshot on mobility), www.euwowgold.fr so we had to make additional adjustments. The nerfs to Death Coil and pet damage in 4.0.6 were never intended to compensate for the addition of Death's Advance, but were completely separate and PvE motivated. We felt that Unholy damage was too high in most PvE encounters, and it was necessary to reduce their dps output as a result. The mastery buff compensated for the intended adjustments a bit too much, so it was necessary to tune down those abilities again. An additional bug fix was also applied to Death and Decay that should not affect damage and was not a part of these balance adjustments.