From reading the other team's forums, this seems like a rare trade which makes every fanbase happy. Warriors could not wait to get rid of Douglas, Miami desperately needed as much cap space as possible and we get picks.
I remember reading a couple years ago that Ainge had a somewhat bad relationship with other GMs because they always thought he was trying to con them. I'm glad he can make these type of trades where everyone's happy because it makes communication with other GMs for future trades a lot easier I would imagine.