I can understand the need for the USAF to publish such a notice in a litigious or blaming society – if only to cover their embarrassment, but this is the technological age and perhaps such leaks should have been expected.
The wording of the final paragraph is unfortunate; how can the disclosure of this information cause the collapse of an investigation. Perhaps this is more an issue of not wishing to embarrass some senior commanders or senators who, based on information in previous posts, appear to lack even the basic understanding of human factors and the nature of human error.
Sensible and well considered discussion in this and other forums, even with speculation, can provide valuable insight to human behaviour and thus identify potential safety improvements from which we may all learn.
I hope that the SIB/MAAF have sufficient integrity to investigate all of the contributing factors to this accident, particularly any organisational or systematic issues, including those which could embarrass the commanders / senators, so that they or those who follow might learn from any mistakes, and for the benefit of civil and military flight safety.