Hmm.. you right 3 point just for [Morbidity] 15 sec is good but DnD is not holding aggro much not like HB like what you say.
For starters you really don't want Morbidity. You shouldn't be dropping down DnD other than at the pull, so reduced CD on it is pretty much pointless. Bladed Armor, on the other hand, is a must. Since tanks gain a huge load of AP from this talent, you certainly don't want to miss it out. Epidemic is something to consider, since it simplifies Mutli Target threat generation and gives you more Obliterates and HBs. But it's hard to have in a DW build.