SOME seatmaps (post May 1/2) have been updated and seem to indicate the NGBC (closet vs galley/closet and 2D/2G not blocked).
However we all know that a stubbed aircraft can mess up all the best laid plans (look at suites/coffins) the day of the flight.
NO guarantee (sans ex-JFK supposedly in May it will be all NGBC on 763s)