The Penguins panicked when Marchand scored half a minute into the game on a breakaway on Crosby's turnover (along with the defensemen being out of position). They were already frustrated at their inability to score in Game 1, and instantly got away from their game plan. But their game plan seemed to consist of trying one long stretch pass after another, which Boston easily foiled just as the Islanders did against Pittsburgh in the first round. Claude Julien is way outcoaching Dan Bylsma, who is very weak at making in-game adjustments.
As far as Fleury, the Penguins had a slight chance of getting back in the game after Vokoun was pulled for Fleury and they finally got their first goal of the series to make the game 3-1 Boston. But Fleury immediately let in a soft goal on the first shot he faced. He is the master of letting in back-breaking soft goals. A laugh track should be put in over the PA system every time he's in the game.
At any rate, the Penguins only slight chance of getting back in the series is to stick with Vokoun and play solid defense with multiple short passes down the ice to try and generate offense, the same way they adjusted to the Islanders. But they are a very undisciplined team, with the league's number one "country club" atmosphere for players going back to the playing days of Mario Lemieux himself. They need a hard-nosed coach and had one in Michel Therrien, but they rebelled against him even after he led them to the Cup final in '08. I'm hoping Bylsma is fired, Fleury dumped, and discipline instilled in the team as they are geared for strong regular seasons but not for the nitty gritty aspects of playoff hockey.