Im still researching as to what the best builds are going to be based on PTR testing. Seems like DW frost and unholy are both more viable than before, but still kind of sucky overall untill a very very good gear level is achieved, and then they become almost competitive as far as DPS is concerned. DW tanking is still only really viable if your not crit immune and need the 2X ssg rune on weapons, if you are crit immune with a 2h then I dont see how DW will benefit you anywhere really. Im not flat out saying its a total crap talent, but I dont think its the best one out there
So i appearently have to eat my words regarding Dual wielding, it is great imo, and im sodding around with Ebon hold weapons. You just need heavy amounts of Hit rating, but i already have that