Ok, my spec for raid dps is reapingless unholy. Now I respecced unholy again and we went to togc 10 just to test our our new specs.
What I discovered is that I was doing shitty dps compared to what I used to. The mage and lock were melting the dps meter with 14k each, the rogue was pulling 8k and I was barely at 7k. That's ridiculous. Unholy is now also the hardest build to dps with, as reaping is baseline so you now have to watchout so you don't waste death runes on crap, as well as timing your festering strike to renew the diseases before they run out . The rotation has changed too.
After the raid, I gave frost 2handed a shot and I did way superior dps to unholy on the heroic dummy, not to mention it was way more fun. I would even say frost now encourages "facerolling", as it's way way easier than unholy in pve.
So, after months of unholy, I'm going frost 2handed for pve.