Given the nature of the ruins, I think it is difficult to ascertain with any degree of certitude what these structures were used for. We can only make assumptions.
What complicates the whole picture is an apparent conflict of interpretation between Jewish scholars and some Catholic scholars regarding the implications of these findings, which each group tending to view the material from their own perspective.
The real truth may lie somewhere in between or be something entirely different.
I think one of the big things was that they didn't claim Mary was a virgin.