Olindaguy, thanks for the comments. The investigation committee must be under a tremendous amount of pressure from many sides and the interpretation of anything that comes out can be expected to have some bias.
For what it's worth, and I would guess it's about zero, the congressional investigation committee have said they've seen enough evidence to lay blame for the collision on the Legacy pilots. One might suspect that other scandals and other congressional investigation committees are getting more of the limelight these days, so that was the easiest way out. At least that's one distraction out of the way, and the Federal Police investigation also seems to have come to an end as it didn't include cross-examination of the airforce controllers.
The entire issue of civil vs military control now having been thrown back to the airforce, and with a handful of the military ATC people suspended and facing courts-martial/jail, the ATC front has gone very quiet.