There is one bloke that does accident investigation in Estonia with I think another two helping neither of which have any high level engineering qualifications. There is no real skill set in country for the systems analysis. Normally there is not a lot of on going incidents to work on hence everything is probably getting farmed out. Its not like the UK where there are several investigators full time with multiple full time resources to call on.
The bloke is probably still getting his head round how an airbus works.
What's happened to the airframe?