I fly out of BOS with AS often. I kind of don't want them to move to B just so I can keep using Jerry Remy's with PP, it's extremely valuable currently (and often I just hang out there until I receive notice of boarding, since security is so quick even when the PreCheck line isn't online anymore).
Although with Amex nuking PP restaurants as a benefit, maybe Chase and others will follow suit anyways by the time this move is completed.