Neil is always very very cautious but he is optimistic that's a very good sign.
He is extremely cautious and
in my personal opinion purely as a member of this forum, sets an example of how any future campaign could approach the problems inherent in interpreting or presenting the available evidence, including new discoveries etc.
There is a knack to presenting the evidence and avoiding the pitfalls. I have said before that I would very much like to see a serious documentary maker tackle the issue from a 'rough justice' type perspective. But in my opinion, they would need to know exactly which issues to hone in on and which pertinent questions to ask, in order to avoid the pitfalls.