I will throw out a useless hot take, just to see how ignorant it is:
Taylor Hall, best Bruins trade deadline pickup this century? Ever?
Hall is a fabulous pick up. I think the ranking of the trade will have something to do with how far they go but clearly, this was a huge move.
There are two, not entirely unrelated aspects to this team (beyond the obvious Bergeron and Marchand contribution). Krejci and Hall. When Krejci is healthy, even without Hall, the Bruins are clearly better. Now pair a healthy Krejci with Hall playing with a new lease on life, and it is a real difference maker. The Bergeron line doesn't have to do it all, all the time.
There are some other really good teams, even in the East Division so the Bruins are going to need all of what they can get from Krejci and Hall and then some but they have as good a shot as anyone.