Michael Govan “sits at the heart of the mainstream museum world, at an institution fraught with change — undergoing hundreds of millions of dollars in upgrades to its disorganized and occasionally dilapidated campus, including a new building, the Broad Contemporary Art Museum, opening this week; accused by some of giving one hardheaded board member, Eli Broad, undue influence; and needing to foster new philanthropists and art collectors in a city not known for either.”