The Canadiens definitely needed more leadership, toughness, and grit after last season. So the Canadiens made the necessary effort to go out and add those qualities to their lineup. One player who they added to bring these intangibles to the Canadiens is Andrew Shaw.
Shaw has proved to be a very effective player for his former team the Chicago Blackhawks. He plays sandpaper style of game, never being shy to be physical or trash talking. He also proved to be an important leader on the Blackhawks, helping them win two Stanley Cups.
The Canadiens acquired Andrew Shaw to get an experienced player to adding leadership and experience.