Boston fans were saddened by the trade of Avery Bradley to Detroit but it was something that had to happen (no matter how much we tried to delude ourselves that it did not). The Celtics were not going to be able to pay him next year when he's a free agent and they needed to move part of his $8.8 million salary this year in order to make cap room for Gordon Haywood's signing. It had to be done and Danny Ainge did a good job of making the best of the situation by getting Marcus Morris back in return.
Think of it this way - the Celtics traded a guy who is hard on Stephen Curry to get a guy who gets under Lebron James skin defensively.
So the Celtics offseason basically comes down to a defacto trade of Kelly Olynyk (who signed a 4-year $51 million contract with the Heat) and Avery Bradley for Gordon Haywood and Marcus Morris plus the drafting of Jayson Tatum (and picking up another lottery pick for next year).
Boston fans should be very happy with that.
All the best to Avery Bradley who if he continues to make strides offensively (and stay healthy) will rival anyone as a top free agent next season.