For our primary backup big (and part-time starter while Perk is out), we needed more of a shot-blocker and defender. J.O. is better than Harrington in that regard.
Also, Harrington has worn out his welcome at just about every stop he's been to. He could be a chemistry concern.
Good point. I think at some points there were somewhat unrealistic expectations regarding what he would contribute. He looked really good early in his career in Indiana, but was 3rd banana behind Reggie and JO, with Artest taking some of the sunshine, too. He wanted a shot at being more than that and got it, but it never really worked out as his tweenerness was exposed in the limelight.
He probably could've had a more celebrated career if he had decided to be the best 6th man out there. He could've been a winner, I think, but perhaps it's a little late for that. I could see him taking a 3-year MLE deal to try to be that for a contender, though. I'm not sure he's still got "it", but someone will give him that shot.