No commentary is better than the commentary of the Lord. This is the best example of the Savior explaining the meaning of a specific scripture. Therefore, no further interpretive commentary is needed.
Rather, we should underscore the importance of John 10:16 for the Book of Mormon. There are only three Bible scriptures which directly deal with the Book of Mormon and this is one of them. The other two are found in Ezek 37:16, which speaks of the stick of Judah and the stick of Joseph, and in Isaiah 29, which tells the Charles Anthon story and explains how the Book of Mormon speaks as a familiar spirit out of the dust. All three of these passages are incredibly important missionary scriptures.