By Morgan Enos It was bracing to stroll into a brand-new creation for a story about destruction. Sixty years after its opening and 45 years after its last gut renovation, the acoustically troubled David Geffen Hall—once called Philharmonic Hall, then Avery Fisher Hall—reopened its doors on Oct. 9, to an audience alternately moneyed, bohemian, or some combination of the two. That afternoon, Sen. Chuck Schumer (D-NY) had rolled up to the ribbon-cutting, framing the hall’s recently completed $550 million renovation in the face of a pandemic as an example of New York unflappability. “We’re still s…