I honestly don't know what's wrong with him. Yeah, he's still among the league leaders in scoring, but he really hasn't had a good season at all. Maybe all of the abuse he's taken over the years has finally caught up with him. Malkin is going to have to carry the load once he gets back into the lineup.
Of course, the bigger issue is that the Pens simply can't beat teams within their division. And since any first-round matchup will likely feature a division rival, they might be one and done again this season.