Is unholy worth keeping?

Got to 90 on the weekend. Felt SUPER weak leveling THE weakest ive ever felt leveling my dk and thats been my main since wrath for all except 2 xpacs. Got to 90 and doing single target 9-12k dps at ilvl 210. Got to ilvl 224 and tried the raid with my guild. Guild leader decides to let come since he knows ive been a very good player in all roles since hes known me. But my dps was TRASH. Doing rotation correctly but i cant get over 20k ST without cds. With cds im bursting 32k. I know unholy got nerfed but is it worth keeping since we want to push CE this season?

Or just switch to ret or destro lock and call it a day?