I'm not inclined to think this is real either but at least there seems to be some evidence that can be examined. It's not at all clear that the examination has been done very well though. We'll have to see what comes along next.
However, you list of questions about it aren't all so very solid:
Criticisms of Cameron et als scholarship:
1., 6., 7.
Assuming Bible is correct even in the details:
2., 3., 4., 8.
Somewhat more interesting questions:
5.
But that one isn't any big deal if we judge that this Jesus was just one of a number of local preachers. To some degree this is also assuming the Bible is correct.
It doesn't leave much.
The biggest objection is that a careful, published analysis is not complete. And by complete I mean including critisism by those who are more disinterested in the question.
Right now it's a big maybe with lots of reasons to not get too excited about it. But your list doesn't represent any real good reasons.