There are many glaring similarities between WoW and this new Diablo, however, most of these changes seem much improved and for the better.
From what I've noticed the DH plays a lot like a Rogue/Hunter from WoW. Both those classes were supplemented by their normal attacks but would spec into, or boost, their specials. That's where "burst" or "focus fire" would win or lose matches.
I think we'll see the same thing here with the DH.
I played around a bit and created two separate specs, both of which may or may not be viable. Until we can all play the game there's a lot of uncertainty.
DH Explosive build:
DH Crit Build:
The explosive build was based off of increased "rocket" damage. What this qualifies as is yet unknown as many of the notes for attacks use different terms.
Lastly, the crit build I derived is based around maximizing your crit % (much like a rogue in wow) where you can use Impale, Strafe and Evasive to do HUGE damage with each having a 400%-500% damage modifier on it.
Evasive seems to make vault redundant, despite its shorter distance it is cheaper and does damage. Smoke screen is a necessity as one of the few "oh !@#$ buttons" the DH seems to have.
Would love to hear feedback and see more builds!