GC has historically dismissed the scaling issue as irrelevant, suggesting they can just buff the damage if it is too low. The problem is that they rarely think damage is too low unless its a mage spec. Scaling IS a problem. Unlike arms frost DKs started off the expansion in a really good spot thanks to high baseline damage (passive haste and killing machine), but has dropped consistently till it is little better than arms. Both specs scale extremely well with weapon damage, okay with 1 secondary stat (haste and crit, respectively), and absolutely abysmally with everything else. Both specs are at or near the bottom in PVE damage on nearly every encounter (hard to tell with arms though since almost no one plays it and the sample size is so small, along with sampling bias....frost still has a lot of people playing it since unholy is really a love it or hate it spec), both scale terribly, and both suffer from having another DPS spec that is performing adequately in raids. Unfortunately for both specs, it is highly unlikely that Blizzard is going to address the scaling issue this expansion.
We just need to put on dresses and prance around like dainty little women (i.e. mages) in order to get some attention from Blizzard.