Here is a snippet of what Hollinger says about Calderon (insider, so I can't post most of it).
"+ Pure point guard who will reliably break down defense and find open man.
+ Good outside shooter and great foul shooter; very effective finisher, as well.
+ Zero lateral quickness since '09 hamstring injury. A traffic cone on defense.
Synergy Stats rated him the league's third-worst point guard last season. Nagging leg injuries are also taking a bite out of his career. Last season was the third in a row in which he missed exactly 14 games. Between that and the defense, one wonders how long he can remain viable as a starter."
And from that, I say would probably say no thanks to Calderon! Let Harris go at years end and get a new FA PG.