The construction boarding of ES 412 and ES 415 does not allow commuters using ES 413 and ES 416 to exit to another path of egress from the Center / Upper Mezzanine. ES 411 and ES 414 have the option of allowing riders to exit either onto the stairs at the Center / Upper Mezzanine. I will investigate tomorrow morning and report what I find here. If anyone has been at the station in the last day and can update us here that would be great.
As of 9:52 pm this evening the MTA page changed the additional elevator out of service from ES 413 to ES 416. Same end result. Both are useless if one is blocked off for construction.