I'm sure this report was a very emotional time for all those affected and you have to feel for them given the timescales involved.
With the final report building upon the same themes as the special bulletin published in Feb 2014 what is not very well understood here is 1) why the AAIB couldn't communicate to that effect at the earliest 2) what elements took so long to conclude from the draft final report that was highlighted way back in May 2015. Was that mere process (i.e. draft final to published final always take circa 6 months?) or was there some element of debate?