I guess you play on 1500 raiting cause that's not true in end game raiding and end game pvp. Frost isnt viable at all above 2k raiting in 3s and 5s.
And Yes frost is faceroll both in pve and pvp.
But unholy is one of the harder classes to master in pve/pvp
When it comes to PVE Festerblight UH just totally PISS on frost single target.
this comes from a 2700 DK and a Storm's end DK in PVE.
---------- Post added 2013-06-08 at 02:00 PM ----------
While Obliterate focus on single target dps and high burst, DW focus on overall dmg and consistant dmg.