Ray isnt about to lose his touch. He struggled vs ATL/CLE because they trapped him everytime he came off a pick and roll forcing him to pass, and when he was running around screens they did a great job of having the big help on him so he couldnt catch and shoot. His shooting wasnt the problem, he just couldnt get a shot off. His ability to create has definately diminished but his shooting is fine.
And the Celtics would be a worse team if they got Maggette instead of Posey.