InterceptPoint and The Man you make very interesting arguments. I may be wrong about when Rule 48 apples. If it only applies prior to entry of a plea then it is consistent with Rule 11
(d) Withdrawing a Guilty or Nolo Contendere Plea. A defendant may withdraw a plea of guilty or nolo contendere:
(1) before the court accepts the plea, for any reason or no reason;
What do you think?