In deference to Kidd's contributions to the game, I will preface my comments with the following: he is far from ideally suited for the international game as he lacks the shooting range or consistency to make zone defenses pay. Benching him in favor of better shooting PGs under the circumstances thus seems to be a rather intuitive move on Coach K's part.
As for whether JKidd is "done" as in on the decline and now surpassed by CP3 and Deron Williams, I don't think there is any doubt. Replace the question mark with an exclamation point!