The website for 56 North Moore Street, a former Tribeca parking lot slotted for new office space, shows renderings of a Class A, light-filled concept built on century-old bones and flanked by three-stories of terrace space. Navigate to the brokerage Avison Young’s site and the project’s nine floors are listed as immediately available to lease. But the project’s developer, Nathan Berman’s Metro Loft, may be rethinking plans for the space, a pivot that would come