stjeromebiblicalguild.org/pbc062706.pdf
Yes, there are fine protestant Biblical scholars. There are also lousy ones who had an agenda. In addition, yes there are Catholic Biblical scholars who have questioned this. If you look carefully, you will probably note that they start after a particular group of Protestant scholars in the years leading up to WWII.
This is a seminar class on the Pentateuch. It is expensive, but he spends a great deal of time talking about the Church’s position on Sacred Authorship, what it entails, and what it means as well as where the idea of non-mosaic authorship really got traction, and why. It is impeccably researched and well presented.
catholicproductions.com/store/audio/pitre/pentateuch.html
And finally yes, the Historical-Critical method has value. I would not suggest otherwise. However, Pope Benedict has repeatedly called for this method to be balanced with what he referred to as a “theological hermeneutic” approach, which takes a similar approach to the Sacred Texts as the Church Fathers did. This approach assumes the validity of authorship and instead focuses on the spiritual, doctrinal, and theological Tradition. The Little Rock Study Bible, in my opinion, has very little of this approach and focuses very heavily on the historical-critical approach, which is primarily focused on what the intent of the human author was at the time, and grounding the scripture in history. This is again, important, but needs to be done in a responsible manner so that it does not overshadow the focus of the Divine Author, and what His intent was. A Study Bible, such as this, not written for scholars, but for the Laity, should seek an appropriate balance but in my opinion, does not seek it, nor achieve it. You are of course, free to disagree.