There are two laws Kevin and two covenants--Old Testament covenant/Law under Moses-- and the New Testament covenant/Law under Faith/Jesus.
The New Covenant IS the Law of Faith Kevin, and it's most certainly meant to "mix with grace". You still can't understand what Jesus and the NT apostles are telling you when they distinguish between the OT Mosaic Law and the NT Law of faith.
There are *two laws--one that was practiced under the Mosaic Law and now we live under the Law of Faith and just as Paul tells you here the same. In Romans 3:27 below, Paul refers to both the Mosaic Law and the Law of Faith, explaining the difference.
Romans 3:27
Where is boasting then? It is excluded. By what law? of works? Nay: but by the law of faith.
And here, Paul is referring to the Old Mosaic Law in 3:28 and that we're justified by the Law of faith and not the Mosaic Law of dead works:
Romans 3:28
Therefore we conclude that a man is justified by faith without the deeds of the law.
Terry, I know your post was to Kevin, but I just want to make a couple points here.
You seem to focused on mere wording.
There are different ways of describing the Old and New Covenants. Some people sum it up to: "Law vs Grace." Yes, there is more to it than that, but Kevin was just simplifying it, getting it down to the heart of the matter, for the purpose of this discussion. That is not incorrect, it's just one way of describing what you are referring to as the "Law of Faith."
I just did a quick search, and as far as I can see, the phrase "Law of Faith" is used only once in the bible, in Romans 3:27.
The word "Grace", in reference to salvation is used countless times, either directly or indirectly.
"For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast." Ephesians 2:8-9
And if by grace, then is it no more of works: otherwise grace is no more grace. But if it be of works, then is it no more grace: otherwise work is no more work." Romans 11:6
"Who hath saved us, and called us with an holy calling, not according to our works, but according to his own purpose and grace, which was given us in Christ Jesus before the world began" 2 Timothy 1:9
For the law was given by Moses, [but] grace and truth came by Jesus Christ. John 1:17
"For sin will have no dominion over you, since you are not under law but under grace." Romans 6:14
"For by works of the law no human being will be justified in his sight, since through the law comes knowledge of sin. But now the righteousness of God has been manifested apart from the law, although the Law and the Prophets bear witness to it— the righteousness of God through faith in Jesus Christ for all who believe. For there is no distinction: for all have sinned and fall short of the glory of God, and are justified by his grace as a gift, through the redemption that is in Christ Jesus" Romans 3:20-24
"For the grace of God has appeared, bringing salvation for all people" Titus 2:11
"For through the law I died to the law, so that I might live to God. I have been crucified with Christ. It is no longer I who live, but Christ who lives in me. And the life I now live in the flesh I live by faith in the Son of God, who loved me and gave himself for me. I do not nullify the grace of God, for if righteousness were through the law, then Christ died for no purpose." Galatians 2:19-21
"But God, who is rich in mercy, because of His great love that He had for us, made us alive with the Messiah even though we were dead in trespasses. You are saved by grace!" Ephesians 2:4-5
So instead of focusing on wording (for example, your point that we are still under "law" but it's called the "law of faith") we need to get to the true meaning, and look at what the New Covenant is, at its core. The New Covenant is about JESUS. It's not about doing works, it's about putting our FAITH in Him, in what HE did for us. We are saved by God's grace, through faith, not works!
Again, works are the inevitable fruit of a living, genuine faith. But works do not save us. All works-based religions (non-Christian or Christian) are teaching a lie, we cannot ever earn our way to heaven or attain salvation by going through a series of rituals or ceremonies.