Jamal Crawford would be a great leader and provide veteran experience for the Boston Celtics.
If Kawhi Leonard wants to continuously be in contention for an NBA championship and be the man on his own team, Toronto is the place to be.
Adding another dominant big like DeMarcus Cousins can help out the Celtics. His toughness and competitiveness can go far in Boston and can help the team in some areas that need to be addressed.
The signing of Kemba Walker is tremendous for Boston. Not only did they find their point guard for the future, but they found a replacement for Kyrie Irving.