It's been this way for the past year but it seems like the Celtics are just figuring it out. Ray Allen isn't an All-Star level player anymore, most of the plays for him, and shots taken by him, would probably be more useful if they were plays/shots for Rajon Rondo. Ray Allen is a nice player for about 10 shots per game and the opportunity to take big shots in the 4th quarter.
KG and Pierce should be 1st and 2nd in FGAs followed by Rondo with between 12-16.
In this series Boston actually needs Rondo and KG to attack even more, they have CLEAR advantages over Mario Chalmers and all the guys Spoelstra is trying to throw at Garnett.
All that being said, Ray Allen has definitely been playing some nice basketball in the past 2 games.