Great study! The preaching of the law is our tutor as you version said. Our schoolmaster to teach us we are sinners. I always preferred preaching in the streets to prostitutes, drug addicts and dealers, and preaching in the prisons as most of these already know they are a sinner.
My take is the law still needs to be preached in some circumstances as not everyone has the revelation they are sinners. The most difficult people to reach are the self righteous or people who think they are good enough.

So many times we offer the cure (Jesus), before the person is convinced they were sick and in need of a physician. Then you wind up with a person who adds Jesus to their life and there is really no change, when in fact or truth, Jesus must become our life.

I was reading the verse quoted here John 14:15, the words of Jesus, “If you love me keep my commands”. Just meditating on it and reading some of the original meanings using Strongs. What I came up with was this. If you love me you will be able to keep my commands. It becomes our joy to please the One we love.
Also dear Sister, I am waiting for the Davidic covenant and anxiously waiting to see if it includes the Covenant of Salt.
Thank you for this teaching!
God bless!
Daddy William