I recently have been seeing a larger than normal amount of duel wielding frost DKs for PVP, So is dw a better damage output now? or is 2h still the way to go?
DW is generally considered superior for BGs, the cleaving damage is fairly massive due to the constant Howling Blast spam. In arenas, most favour 2H still, due to Necrotic Strike not working with Threat of Thass, though some do use DW there too, which can be effective in certain cleave teams.