The Moral Will of God and the Law

I am a former OPC member (moved to different city) and have settled at an Independant Reformed Baptist church. It is a small congregation which embraces Calvinism and New Covenant Theology. There are folks with varying views within the congregation regarding Covenant Theology including the pastor (obviously). I have been challenged to re-think my views on Covenant Theology and the Law of God (Mosaic); and as a result, the continuity / discontinuity issues with respect to the Old and New Covenants. The WCF seems to affirm unity with respect to the decalogue in particular with strong affirmations with respect to the third use of the Law. The NT seems clear when it speaks of the difference between the Old and New Covenants and the liberty from the Old. Yet the 10 Words appear to have relevance in the current age. It cannot be disputed that in the economy of the New Covenant period that the church at large and the individual christian has ethical/moral responsibilities. Yet these responsibilies are laid at our feet as a path to walk in a different manner. The law of love is to motivate and guide us. Lee Irons has written about the Moral Will of God and perhaps expresses our relationship to it in the differing redemptive economies very well.