I hike Breakneck a coupla times a year. It's just about in my "backyard".
Breakneck is a 3rd class scramble, and I don't think there's any "trail mantenance" per se on the scrambling part, other than occasional repainting of the blazes, and even less frequent re-routing of a short section of the route if the erosion is worse than usual in a given area.
Unless this "A" trail is a variation I've never done there, which is possible, but unlikely.
Too bad Freddo doesn't post here anymore
, he is the guru of all things trails in that general area.