Howling Blast and Dual Wielding

   Howling blast is a must. Trying to make a howling blast build, that doesn't have either the higher frost talents, or impurity, is a real gimp. You give up a ton of damage not going to down the frost tree, or at least to impurity in the UH tree.
To be honest, Frost is all about crits. Killing machine procs and cinder procs on weapons. Obliterate absolutely sucks in general as a talent and especially with a 1h you will get far more DPS out of howling blast or icy touch even.
Specing down into blood is really a weapon based damage tree and then using one hander is another gimp. If you're going to go blood, do it. If you want a hybrid frost build, then it's really hard to beat unholy, at the very least down to impurity.
So here is the biggest change that's come along in 3.0.8 is simple: Howling Blast no longer has a cooldown. If it goes live, this change may single-handedly vault dual wielding to the top of the Death Knight charts, with builds designed to churn out Howling Blasts as quickly as possible dwarfing the damage potential of all other builds.
To get an idea of how this works, check out this Frost-heavy build, or this build which is more Unholy biased. The main point with both these builds is to grab Howling Blast, Killing Machine, either Reaping or Blood of the North for the Death Runes, and as many other skills as you can grab to up your magic damage and/or Howling Blast damage.
In theory, you can unload Frost Fever, spread it with Pestilence then keep unloading Howling Blasts as fast you can proc Rime and convert Death Runes with these builds and the new instant cool-down Howling Blast. In other words, you want this build to be dual wielding in order to maximize your number of Killing Machine procs which is also why you want Unholy as your secondary tree since Necrosis and Blood Cakes Blade are considered essentially mandatory for decent dual wielding DPS.
Someone may do not think this change will last and Howling Blast will see a cool-down again. Either that or killing Machine or Blood Caked Blade will get some sort of internal cool-down nerf just to make sure dual wield Howling Blast builds don't get a smidge on the overpowered side. Recently Blizzard has said that they understand that making Death Knight talents and skills too dual wield friendly would simply result in the complete marginalization of the two-handed playing style just as it did for Enhancement Shamans, in fact. Thus, we won't see this build dominate for too long without some adjustments. Without doubt this may be pro two-hander bias speaking.
If this change does go live though, any serious Death Knight DPSer is going to want to find 2 decent 1-handed weapons and spec into some Frost talents, I'm pretty positive.
The defense weapons could go in bind on pickup and Howling Blast could stay on instant cool-down. There's still time to see how they shake down. The expansion and the class are still young, and I'm just enjoying the ride. I hope you'll all keep on riding with me, and we'll see where we are on the other side of the patch.