Bad survivability = unviable for 2v2’s.
Too early in the xpac for Necrotic Strike to be useful. Once everyones ilvl is higher, and stats are more bloated, Necrotic Strike will be more impactful, Death Strike will be more impactful, and the burst meta will fall off.
Hard to say if DK will ever be able to 2v2 in SL though.
Unlikely if Warriors remain un-nerfed.