The Kings need to add defenders to compete in the west. Particularly with all the bigs out there. While Davion Mitchel hurts their perimeter defense. Their interior defense would be bolstered heavily with Claxton.
The Nets do this trade really for the pick. If they’re going to be competitive they’re either going to have to draft a star. (Which they can’t because they don’t control a lot of their picks due to the Harden trade). Sign a star. Or trade for a star. They can only do that by loading up on picks and young guys.