While Sweeney has had some difficulties with drafting (2015), he has managed to assemble a competitive team around veterans such as Patrice Bergeron, David Krejci, and Brad Marchand, on a consistent basis.
All the acquired players are either top-six forwards or top-four defensemen, with Coyle and Hathaway being the kind of players needed in the bottom six. They have all signed significant extensions to remain in Boston as well.