4.3.4 Shadow Priests

Regarding the Shadow Priests in Neltharion4.3.4
When will they be fixed ( Haste % ) and Mastery Bugg.
33% Shadow With 19 Mastery does approx 19-21k In Single Target Rotation . ( 25-27 with Volcano/Trink Starting Burst ).
I know Shadows are nerfed in Cata, but this is ludacris, Player must Aquire T13 4set and Haste/Int 397 Trinks in order to have normal damage in raids, not including Legendary weapon.
I understand that this class ( Warlocks also ) ,have a different approach to the DPS area , but at least u could fix the Haste% Tics for Shadows, u can leave mastery as it is , or the other way around....