Last night I was doing some 5-mans and we had a DK need roll on a tanking one-hander, then was shocked when I told him that with the invention of the 1h tanking runforge he really wants to use 1h dps weapons, not tanking weapons. I've seen this mistake by a number of DKs since that patch, so I thought I'd say it openly and clear:
If you want to tank as DW frost, please use dps 1h and the def/stam runforge enchants. It is the best option.