Waaay to lengthy, many diversions off plot... If this was made for TV as "investigative journalism", the editor-producer probably would have cut this easily to half (or less?) in runtime length.
It's a good story, worth telling / watching. In hindsight, I'd probably recommend to others to just watch the last episode. It contains some of the best clues, IMO.
The middle two episodes... my goodness, they really drag out, repeat scenes / themes, present us with non-credible "witness" accounts of what I can only describe as opinions (i.e. Journalistic garbage) that attempt to mislead the viewer. Why did the producer leave these in the final cut? Did Netflix have a minimum runtime duration stipulated before purchasing this documentary?
IMO, besides the only disappearance of a person (apparently), ever, in the history of The Vatican, this documentary length is a mystery that should be solved.