This is the Boston Celtics trade they do this trade for reasons below
They get rid of Kemba only for Quickly and Robinson
They get CP3 who is a much better fit then Kemba because CP3 can lead them in the locker room and on the court he can distribute the ball at an elite level which Kemba could not do
Fournier's resigning will keep Boston's depths somewhat intact
(they had to give up Kemba to get CP3