What does how old it is have anything to do with it? God's Word does not change, nor does God MALACHI 3:6 and God's commandments are eternal just as Jesus told us very plainly. Matthew 5:19
The bible has to reconcile so your interpretation of Col 2:14-16 does reconcile with 1 John 5:3, Genesis 2:1-3, Exodus 20:8-11, Isaiah 58:13, Isaiah 66:23, Mark 2:27-28, John 14:15, John 15:10, Revelation 12:17, Revelation 14:12, Revelation 22:14-15, Matthew 24:20, Luke 56:23, Luke 4:16-22, Acts 18:4 which you have yet to address these scriptures.
I am beginning to see a pattern here that you are falling into the trap of only quoting Paul's writings and ignoring the rest of scripture and like others in Paul's time have no understanding of what he is saying.
Notice this does not say we are free to break the letter of the law and this again shows us that you have no understanding of the scripture you quote from. You are trying so hard to "do away" with God's holy law that was written by the hand of God and kept in the Most Holy of God's Temple. God has a Temple in Heaven that also has an ark of the covenant
Revelation 11:19 Why are you trying to make a case against something that was personally written by God and kept in the Most Holy of God's temple. The thing is you do not need to convince us, you need to convince God that you do not have to follow His laws and can ignore the majority of the bible. Jesus has warnings for those who teach others we can disregard the commandments so I would seriously consider what you are teaching. Matthew 5:19
I don't think you understand the new covenant from the old covenant which Paul is contrasting in 2 Cor 3-8. By the way a covenant is not a set of laws, it is an agreement. Paul is referring to the tables of stone versus the tables of the heart. God writes in laws in our hearts and minds in the New Covenant Hebrews 8:10, Jer 31:33 so the law has not ended, they are in our hearts. The law is not done away with the application of how we obey God is what changed. They are written in our hearts, so we obey out of love John 14:15, John 15:10, 1 John 5:3. They are written in our minds so we remember to do them. James 1:22, Paul said Romans 2:13 For it is not those who hear the law who are righteous in God’s sight, but it is those who obey the law who will be declared righteous. Revelation 22:14
Blessed are those who do His commandments, that they may have the right to the tree of life, and may enter through the gates into the city.
I would reconsider your theory that God's Ten Commandments are not required for Christian living because :
But
outside are dogs and sorcerers and sexually immoral and murderers and idolaters, and whoever loves and practices a lie. Revelation 22:15
Friend, let's not find ourselves outside of God's kingdom. While we are saved by God's grace , we all have to stand before Jesus on judgement day based on what we did or did not do on this earth.2 Corinthians 5:10
God blessed the seventh day Sabbath and made it holy to both Him and to us. Genesis 2:1-3, Exodus 20:8-11, Once God blesses something you cannot reverse. Numbers 23:20. God asked us to remember so I am going to obey God and even the disciples told us we ought to obey God over man. Acts 5:29