I tried this yesterday and loved it a lot. I am not geared yet, but did very well in 10 man and doing 25 man hopefully soon. I like what it brings, but pet can be annoying.....buffs to raid = ownage.
It seems like Desecration might be more valuable to a pure dps spec than Necrosis, but maybe that's just me. Would love to hear your thoughts on it. Also, you have two points left over, is that intentional?
As for necro vs. disecration, I tried both and overall dps was better with necro. I still would like to try disecration even more, but now with the new blood changes, that blood spec looks sexy..Heart Strike ftw on new changes.