Lemain,
By your own admission you have little or no subject matter expertise. Therefore, you are not qualified to make any comment on the standard of the investigation or of the report or the competence of AAIB, although you are entitled to your own opinion. However, speculative criticism of a team who have worked long and hard for almost 2 years to produce what is undoubtedly one of the most in depth AAIB reports ever is totally unjustified. If the experts deem that an item is not relevant, eg. radar track accuracy, then why would it be included in an already large document? Reporting should follow the tenets of Clarity, Brevity and Relevance. In a complex investigation such as this, brevity stills runs to 452 pages. Any additions of irrelevant comments would make the report even harder to digest for victims, industry and the pilot.