CS,
It would seem that if they do put newhires into the FDA that they wouldn't have to do it until the end of the training letter (potentially awhile away) so you may have some time. Hopefully by that point this will have settled out a bit and you won't have to go unless you want to. Pure speculation, but I could see a clean up bit that would try to entice a few more near-dead retreads to take the offer to get a window seat. There were a bunch that couldn't hold it on this latest go around.
Who knows, but the best of luck to you,
TSD