Lots of people/organisations failed in their duty of care.
Maintenance companies - for lying that the aircraft was airworthy and meet CAA requirements for the renewal of its permit.
CAA - for allowing the maintenance companies to self-certify that they have cried out work and that the aircraft meets CAA requirements. Accepting flight tests that were not carried out. Allowing airshows to be conducted without sufficient regulation and inspection.
Airshow Organisers - for not having full risk assessments and policies in place regarding planned displays.
Pilot - for not providing the airshow a flight plan (even though they had not requested one). Not performing a flight briefing with the FDD or the other pilot/ or another competent display pilot.
I too agree there appears to be some things missed or not covered/mentioned in the AAIB report, but it is objective as to whether these are deemed relevant as it may be to some parties but not to others. The coroners investigation will again not be apportion blame but to establish who, when and why the person/s died. It will be upto the police/CPS to deem if any crime has been committed and if it is in the public interest to prosecute.