Wrs are all nuts... even the ones people think are grounded and good... Hines Ward got a DUI with his mistress in the car abd tried to pull the old" do you know eho I am" on the cop
Larry Fitzgerald, who was the poster boy for good, kind, hard working star wrs, had a domestic abuse charge in 08.... 
You keep them till the drama exceeds their talent contribution... 
Players arent choir boys... if they had social media in the 70's - 90's, many of the guys we hold on a pedestal would be viewed differently.. 
Pickens is very young, still cheap, and his on field value is still very high... DJ was an expensive Starter that already reached his potential and who was both a locker room issue and a problem on the field... his drama wasnt worth his production