OLD :
Item - Death Knight T21 Blood 2P Bonus -Death and Decay Mob Damage Reduction Enemies standing in your Death and Decay deal 0% less damage to you.
Item - Death Knight T21 Blood 4P Bonus - Vampiric Blood Rune Haste While Vampiric Blood is active, your runes regenerate 15% faster.
NEW :
Item - Death Knight T21 Blood 2P Bonus - When a charge of Bone Shield is consumed, the cooldown of Dancing Rune Weapon is reduced by 3.0 sec.
Item - Death Knight T21 Blood 4P Bonus - When Dancing Rune Weapon fades, your Rune regeneration rate is increased by 15% for 10 sec.
Okay so we had a possibly decent 2P and a terrible 4P before,now we have a terrible to useless 2P (depending on how much magic damage there is) and an useless 4P that is even worse than the old 4P.
I can only hope that they'll change it soon,because if it goes live like this,we'll keep using T20 4p,and won't even consider putting a T21 piece on