Is anyone else disappointed by this sudden turn of events. The mastery preview made it seem like they had a very clever solution to this very obvious problem (that was pointed out almost immediately by the community) and said that it would be presented when the DK overhaul was going to be presented. After all this waiting and anticipation they issue this statement today and it's essentially a suggestion of the community that they took and a total 180 degree change from one of the things they said they liked about DK's the fact that they were going to try something new and different where each spec was capable of both DPS and tanking.
Since that design paradigm has obviously been a mistake, here's another solution blizz. Don't make Blood the tanking tree, the logical tanking tree is obviously Frost. Continue to make Blood the physical DPS/self healing tree so it can work like an arms warrior while Unholy remains the spell damage/pet dps tree. Frost should be made into the tanking tree so that all those tanking 1 handers can get dual wielded for tanking DKs,much in the same way Prot Pals and Prot Wars wield a 1handed STR tanking weapon and shield. As a nice side effect, you don't have to design STR DPS 1handed weapons anymore and continue to make only AGI DPS 1handed weapons which can be used by Rogues/Shaman/Hunters.
Also I doubt people are as attached to DPS DW Frost as much as DPS Blood/DPS Unholy, after all wasn't DW DPS frost only recently made viable in 3.3.3?