This is an excellent trade for the Celtics. Not only does it make us bad enough right now to compete for a top pick in 2014, it stacks us with draft picks down the road.
Looking at Brooklyn's roster contracts, they will not be in good shape to sign free agents when Pierce and KG retire. Down the road they're looking at Lopez, Williams, Joe Johnson, MLE, and vet mins. In 2016 that team could be TERRIBLE.