I don't think the external investigator will find anything that will satisfy the public. It's just been too long.
Linus is suffering from the classic " what got you here won't get you there " problem. And there's going to be an adjustment as the new CEO puts in practices and standards that have been eschewed for a long time.
But this is just part of being human, that's why in science things need to be reproducible, so that we can hopefully isolate the ego variable across multiple people.