Coroners and their courts are competent to do what they should do: which is determine the "cause of death" i.e. unlawful killing, accident, suicide etc. In those terms there is little doubt about this accident.
Their views about technical matters in specialist areas (such as the cause of an aviation accident) aren't worth much. With respect, they don't know what they are talking about and don't usually have suitable advisers. The AAIB guys/gals will of course be closer to the truth, but they may not have finished their investigation yet.
From what I recall of the wreckage, there may not be much physical evidence for the AAIB to get their teeth into.
It is a modern mistake to misunderstand what a coroner's court is for, largely perpetrated by the media.