I think we need to read the OT carefully distinguishing history, prophecy, political actions, and cultural traditions. I find the OT is full of examples where *more* has been added to the law – a tradition that continued since Eve added we were not even allowed to touch the tree of knowledge of good and evil. My understanding is that its historical; and within its political framework, what is spoken as for the Lord need not be an exact representation of the Lord’s will.
Within a Christian hermetic, my interest is in the prophetic texts which point to Jesus. He being the fulfillment of the law and prophecy. I don’t see the Apostle Paul laboring to teach the Gentile church from these type of texts and so I think we need to be cautious to do so as well.