I am working on an extended exploration of how and why Paul abolished the Law, and what that means to us in our walk with God. The study is in its opening phase, so you may want to drop by again some time.
What do I think? I think your theology is pretty solid.
At the risk I’m sounding like a self promoter, I have thought a lot about this, and you may find my conclusions helpful (or you may not!) – The Old Testament Law and christians.