No team enters the Stanley Cup playoffs facing higher expectations and carrying more playoff baggage than the Washington Capitals. Winning their second straight Presidents’ Trophy as the NHL’s top regular-season team will only further bring into focus their failure to get the job done if they go home early. Captain Alex Ovechkin, who scored just 33 goals after averaging more than 50 goals per season for the past three seasons, is the lightning rod for much Capital discontent — but he is likewise the single-most important player if the Caps are to break through this spring. As one scout told me recently, “Helluva team.” But, he added, sometimes that’s not enough. Will it be this spring? Yes.