As a parent of a current Falcon I get your frustration. However consider the groups that are still waiting: LEAD, Falcons, Prep school. All these candidates are captive in that they are highly committed to USAFA. As you said, it is difficult for your DS to even have a B plan at this late date. From the viewpoint of USAFA, these candidates have the least alternatives and therefore have become the lowest priority for the issuance of appointments. The priority in the appointment process has clearly been on other candidates that are more likely to go elsewhere including competitive candidates that have already received the TWE. That is why the Falcon scholarships are being awarded next week in an effort to capture some very desirable folks that just missed an appointment before they decide to go somewhere else. And then at the very end of the process, we will finally hear. Consider that this is exactly why Falcons this year for the first time received a LOA in January. Admissions knew this was going to be an extremely long haul.
So while I share your frustration, I do see the logic.