I see where you're coming from, but your descriptions are confusing. I still don't agree with your train of thought, even though I understand your definitions. That was redundant. sorry.
The only change to the law is the administrator. (Our Messiah) The words haven't been changed for God doesn't change what He has ordained from the beginning. If I read you right, you are saying the law changed because of the change of the tribe. I'm saying the Priesthood changed hands,
First of all, there is no "administrator" of the Law in Scripture.
There is only the giver of Law in Scripture.
Moses was the
Lawgiver of the
OT Law.
Likewise, Jesus is not an "administrator" of the Law, for there is no such thing in Scripture.
Jesus is the
Lawgiver of the
NT law, which
sets aside the Mosaic law (Heb 7:18-19),
replacing it with the law of Christ (1Co 9:21; Jn 13:34; Mt 22:37-40),
which fulfills (accomplishes) the Law (Mt 22:40; Ro 13:8-10),
but has no curse attached for imperfect obedience (Dt 27:26; Gal 3:10),
which is a
huge difference for the people of God.
Without the curse for imperfect obedience which fails to do "every word" (Dt 27:26),
it is
not the Mosaic Law.
Secondly, the text states that the law was
based on the priesthood
in the order of Aaron (Heb 11:12),
which
prescribed that Aaron and his descendants
only would be priests,
with the firstborn son of each generation being the High Priest.
When the
basis of the law (the priesthood in the order of Aaron's descendants) was changed (Heb 7:11),
the law had to be
changed.
The text of Heb goes on to clearly explain
what and
how it was changed.
It was "set aside because it was weak and useless" to obtain righteousness (Heb 7:18-19)
The case is carried forward into chap 8, where since the law was set aside, the Sinaitic (Old) Covenant
based on the law, was thereby made
obsolete (Heb 8:13).
This is the revelation given (spoken) by the Son in the last days (Heb 1:1-2) through the NT writers,
which you are not reckoning with.
which was the plan from the beginning because Christ created all things. Colossians 1. The Words that came out of God's mouth to Moses never changed, and there is nothing in the Bible that says it did. God intended the law to be what it is today by putting it in place (to the detail) during the time of Moses.
That claim is contrary to the revelation of the Son spoken in the last days (Heb 1:1-2), through the writers of the NT.
And that is the revelation with which you have not reckoned.