i agree with you in the part that they definitely dont have anythign against you, but them requesting nam check expedit is a good maneuver, so they will like if they did all they can( at least on the UScis side) and that will get a lot of credit from the judge, which will make a bit harder on you to prove otherwise.
secondly i think it is only a matter of time before everything is cleared and done, sure it have to bee a reasonable time but am sure it is a lot easier for them to connvince the court that a period of a (moth, 45 days ) is reasonable, since the fbi are busy, and have a limited number of expedited checks they can do in a priod of a week, or a month( as one here have mentioned, about 50 per month, or per week, Not really sure) buti think a request of extention will give you a chance to give them a chance, and by the ebd of the extention you can say to the court, that it is clear that they are not serious about resolving the matter, and then it is more likely taht you will have the sympathy of thecourt.