I've studied the compilation of all dps done on Patchwerk as well as other bosses. There is not a SINGLE dps report that has the shadowpriest in the top 10
. Not with the new patch. Not with the changes. Not with anything. Shadowpriest dps sucks. it's across multiple raids. It's independnt of player skill.
I would like to see an official blue statement from Blizzard categorically stating that it is even POSSIBLE for a shadowpriest to be in the top 10 let alone top 5 of dps on a equally skilled and equally geared raid.
I am the GM of a sunwell clearing guild and played a shadowpriest in TBC and I see no reason WHATSOEVER to bring a shadowpriest to raid. I will be forced to switch to holy for the expansion. We have a druid that's decided to go moonkin and with his aura + innervate + combat rez + the 3% hit buff AND MORE DMG on top of that than a shadowpriest, why the hell would I put one in the raid. Their last gimmick (VE heal) has also been taken away.
Basically my premise is that if you have a boomkin druid (which you should as they rock) adding ANY dps class/spec in place of your shadowpriest will make the raid group stronger with both increased utility as well as dps. ANY class/spec. Shadowpriests are the bottom of the barrel. It's what you will force your healing priests to play if the boomkin can't make a raid. That's about it.
It's too late to make game changes now. Shadowpriests are dead. RIP. Farewell to the TBC glory days.