The nice thing about coronial inquests (I've been an expert witness at several) is that they usually look at aviation accidents with a different mind and different opinions to those of us who are involved in aviation in our daily lives.
There seems to be a view on these pages that the ATSB is beyond reproach. I agree that our ATSB investigators are some of the best in the world, but they can, and do get it wrong from time to time. It is important therefore, that the ATSB, and in this case Airservices and CASA, are subjected to external scrutiny because this is how we can learn and develop even safer systems.
I am surprised at the extent to which some parties are going to try to limit the evidence presented to the coroner. Wouldn't it be better if all the potential contributors and mitigators where considered?