re: the deal with Lando & "pray I don't alter it any further":
A LE character could simply say "I made a non-binding agreement with this crimeboss, and now I'm going to take advantage of how not-legally-binding it actually was."
Anyway, as the authentic representative (in his mind) of Law and Order, Vader could always advert to the old saw that the police may lawfully lie to a criminal in order to apprehend that criminal or other criminals.
A LE character could simply say "I made a non-binding agreement with this crimeboss, and now I'm going to take advantage of how not-legally-binding it actually was."
Anyway, as the authentic representative (in his mind) of Law and Order, Vader could always advert to the old saw that the police may lawfully lie to a criminal in order to apprehend that criminal or other criminals.