First, I would use the PTR whenever its available to make some of these decisions if you can.

Is there an affinity with multiple affliction warlocks? I am not sensing one in mine, I definately revisited them in Wrath to 80 and they just were horrid. And the change to stacking improved life drain was the nail in the coffin for me. Maybe 4.0.

You don't really need ports do you? With the low hearths cooldown and Dal providing all the portals.