For what its worth, Windhorst was bloviating on the Tony Kornheiser Show this morning and declared he thought Hayward would go to Miami. He claimed he's heard from several agents stating players don't have a good view of Boston because of the draft pick "assets" situation. From the Miami perspective, Riley can set the team up around him, can get players around him rather than talk about draft picks, and can set him up for a run at the Finals every year in the East.
This of course doesn't make any sense because a) Celtics are also in the East, b) are already better than the Heat, c) have been able to attract free agents and develop talent internally.