For me...it is obvious that Paul dini was the retard filter...
Bruce timm had become the new george lucas. I often refuse to give him credit for batman the animated series.
What Paul dini made since DCAU
Arkham games which defined batman for a entire genration and brought batman to new popularity heights
What Bruce timm has done since the DCAU
Destroyed a Alan Moore classic, defended man of steel, create a cash grab Harley quin film.
He never understood the characters
He said this about the justice league cartoon
"I excluded the supporting casts of all these superheroes because they were not written to have chemistry together...so we basically got rid of them so that they will be forced to interact with eachother"
Not exactly what he said...but it speaks volumes to me that Bruce timm could not write these characters with all their complex relationships.
Justice league suffered because none of the superhero had lives outside of being justice league members.