Brooklyn Museum director Arnold Lehman is reinventing the museum. But “Lehman crossed a line in his relations with the art world this summer when he reorganized the Brooklyn Museum’s curatorial staff –– dividing it into two teams, one for collections and the other for exhibitions. Some saw this as an effort to centralize power and thus pursue his vision for the museum more efficiently. By October, two senior curators and two board members had resigned out of frustration with the museum’s direction. It seems a good time to ask: Setting aside the question of Mr. Lehman’s popularity (or lack of it) in the arts community, will his approach work?”