WotLK What happened to locks?

[Predicament]

Hey, I stopped playing a couple of months ago and now I have come back, and it feels like there is something very different with affliction warlocks, I decided to do a voa 25, and my dps is significantly lower than what it was a few months ago, for example today on frost boss I did about 12k dps, but I have screenshots of me 5 months ago doing 16.2k dps on voa frost boss, and 17.3k on Jaraxxus @ toc 25, the only difference between characters was: I used to be an orc, i'm currently human, gear is the same and buffs are nearly identical. I even tested on a training dummy, and I used to do several thousand more dps, was there a huge change that I wasn't aware of? thanks for the help.

[Predicament]

Nevermind, I realized it was before the new core.

[Whiteman]

well any way orc warlock is doing more dmg then human, racial spell power bust and racial that pet's hit harder