The purpose for the Ten Commandments in the New Testament is not to tell people that every time you sin by breaking one of these commandment you must make a sin offering by providing a blood sacrifice in order to cover your sins and not be made unacceptable to Almighty GOD. To suggest such a thing would be to ignore the Ultimate Sin Offering made by the Blood Sacrifice of our LORD Jesus Christ and act as though His Sacrifice was of no meaning and of no affect. In truth, the Sacrifice of our LORD Jesus Christ not only covered our sins but cleanses us from our sins whenever we confess them to Almighty GOD and rely upon His Grace through faith in the Sacrifice, Death, and Resurrection of our LORD Jesus Christ.
We must be aware that it is the Law of the Spirit of Life in Christ Jesus that sets us free from the Law of Sin and Death. Do we understand that the Law of the Spirit of Life in Christ Jesus is still a law? We seem to forget that all of creation operates by given laws that are always in operation in order for there to be consistency in existence and not utter chaos. By living in accordance with the Ten Commandments we are living in accordance with the Laws of the Kingdom of GOD, and derive great benefit by doing so; we keep the door to sin closed so it cannot overrun and ruin our lives.
I believe that the Ten Commandments are not only ten simple commandments, but have a purpose for the New Testament believer in Christ Jesus. These commandments contain wisdom for living in peace and harmony within the Kingdom of GOD and adhering to them prevents us from wandering outside of the jurisdiction of the Kingdom of GOD and into the jurisdiction of the Kingdom of Darkness ruled by our Adversary, Satan, who is looking for any reason to be legally permitted to steal, kill, and destroy every one of us. Living life according to the Ten Commandments prevents Satan from having such legal standing to impact and ruin our lives.
I also believe there is wisdom in the Ten Commandments that when understood helps us be better sons and daughters to Almighty GOD, and better brothers and sisters to each other.