Pressure from the American Federation of State, County and Municipal Employees, a Goldman Sachs (NYSE: GS) shareholder, to change the investment bank’s board composition has dropped. That has not stopped senior management and the board from considering a new management structure that has been adopted by a number of other large U.S. companies. The change would mean a separation of the roles of chairman and CEO. Lloyd Blankfein holds both titles now. If there is a shakeout as part of a new structure, Blankfein, who is plagued by missteps by Goldman, may be out altogether.