New beta built, new talents.
Blood has some significant change, I'm not sure if they're 'nerf' per say, but they do sound like it.
Link to old talent tree so you can see the difference: http://www.worldofwarcraft.com/info/classes/deathknight/talents2.html
Scent of Blood:
Chance lowered from 25% to 15%.
Bloodworms:
Changed from 60% on a Death Strike to 10% on white attack. Also proc 2 to 4 worms, instead of always 4.
Blood Aura:
Changed to all party or raid member within 45 yards are healed by 2% of the damage they deal.
So I guess no more 5 DK instance run...