SARATOGA SPRINGS – Saratoga Performing Arts Center's new executive director hailed the 2017 season as a success but announced the New York City Ballet's residency will be shortened yet again.The 2018 ballet season will be cut in half, from a two-week run in 2017 to just one week."I know that this is heartbreaking news for passionate ballet fans," said SPAC's President and CEO Elizabeth Sobol when reached on Sunday.