Paul is saying that justification is no longer given by blood sacrifice. Which up until the death of Christ was the only means allowed to gain forgiveness. Christ Himself said He did not come to change one jot or tittle of the law but to fulfill. He fulfilled the portion of blood sacrifice as means for forgiveness. But thou shalt NOT commit premeditated homicide still remains in effect and the same God commanded punishment for those that commit such an act is still required.
As for the 'remember the Sabbath day' commandment, Christ became the Sabbath and we in Him, should be in Him every day as He is our 'rest' as that is what the word Sabbath means. And I am not saying it means to forsake the coming together as a church or body in Christ. And if one were to consider what it requires to do physically to present oneself in church on any given day requires 'labor'.
By the time Paul began his ministry all matter and manner of man's traditions had been brought into religion and Paul speaks to those of the OLD covenant, those of the elect, and those that are Gentiles. But it will be the Heavenly Father that will judge the 'hearts' and minds of each of us.
I don't disagree with you here but it is noted that you side stepped the question...