BOS is a concern. I have only used the one in the main part of term A, seems like the one stated to close. It's a really nice club. New, elegant, and well placed. I only use DL to BOS for DCA service and the flight have, maybe that's switching as well, keft from the main part of A.
If there was a merger with NW I would assume some club closures. Bit before that seems strange.