Especially when their problem won't be fixed by simply getting a defenseman or another goal scorer.
I had a working theory that the problem wasn't a need to deliver more hits or that they get hit too much. Watching them play live verified this for me - it seemed to me hits, for or against, didn't matter, especially on D. Dahlin, Krebs, Power, and Girgensons hit people. So, a-guy-who-hits is not a solution, either.
If they were trading for anything it should be to trade for an assistant coach who specializes in defense.