For the Pacers and Celtics, this is a trade that addresses the greatest needs for each team. The Pacers land a wing who can shoot well, and the Celtics land the point guard they really need. This also diffuses any issues for Indy to fully commit to Haliburton at the point.
For the Hawks, they gain a really intriguing player to bolster the backcourt with Young, while keeping their frontcourt in place with both Capela and Collins.