So does the seat map open up close to departure? Looking at a Caribbean destination (so technically Business) designated as a 739 but only showing two rows. Trying to block a family of four as 2x2 rather than 4-across, but right now that requires taking the bulkhead, which I would prefer to avoid. Will there be some point that I can move us to rows 2 and 3? If so, any idea how far out?