Rockets and avionics gets a lot of oversight from everything from the State Department, the Department of Defence, FAA, etc. It comes under all of them in one part or another (since the rocket will fly and land over non-US territory it comes under the State Departments perview).
However, none of those are probably the reason for the lack of detail. The main issue will be lawyers and risk taking. If the US government launches a rocket it is covered by various indemnities that Congress has laid out to make sure that lawyers can't sue anymore because the rocket might have caused someone's eggs 10 states away to go bad (either from etheric vibrations or that the rocket landed in said eggs.) When a private company does a launch it is completely different scheme and anything that comes under the words "problem" becomes a lawyers meat and potatoes. So every lawyer from NASA to SpaceX and inbetween is probably exercising the almighty red-pen on what is going on... just to make sure that they don't end up in a multi billion to trillion dollar lawsuit [The amount estimated what could have been sued for the Columbia disaester was in the low trillion dollar state.. if the US government had allowed itself to be sued.]