i can tell you from experience that while destruction warlocks are busted right now. they wont be as bad at lvl 70. they needed the buffs, but blizzard didnt realise that buffing them this early would have such a bad affect, and the reason incinerate is hitting for 60k in pvp is not because of the buffs.
its because decimating bolt is still available. the necrolord ability. we did not get decimating bolt in our talent tree. so it will not be there at lvl 70…but decimating bolt buffs incinerate by 100%
so there ya have it. the secret to why destruction warlocks are so strong right now. relax until the expansion hits. cant speak for affliction never liked that spec, but am enjoying the 60-70k crits in pvp as destruction while it lasts, since its only temporary