If not "one jot or one tittle" has passed from the Torah, this is clearly unavoidable and non-negotiable. As I understand it, this would mean that the New Covenant is but an extension to the Old Covenant and we, as believers today, are still under the entire Mosaic Law. I don't agree with this view, but I understand it.
I am definitely not in the preterist/all_fulfilled camp, David, so can't agree with that aspect of your comment.
But as to the above, I don't believe that we are "under" anything, any more than we are "under" the Law of Gravity. But it still exists, still applies, as do the blessings and curses He taught us about - and will, until "heaven and earth pass".
(I won't go through the whole list you referenced. But I note instead that Yeshua did not "do away" with "the Law", or "nail it to the cross", or any such thing. He redeemed us from the CURSE of rebellion, of willful disobedience to His teaching and instruction -- which was death. I've already noted that Yeshua NEVER changed His Sabbath, and nowhere in Scripture can such a change be found -- even less so than the elevation of monogamy to an Idol, arguably. In both those cases, and many others, it was a change instituted by "the Church" at a MUCH later date; the traditions of man continuing to replace the commandments of God.
Just one example - which has been discussed elsewhere here before, so I won't repeat at length. Yeshua's sacrifice did not change the DESIGN of our bodies, or of pigs or shellfish. God made the latter to be scavengers, to clean up toxins and poisons and absorb them in their flesh, and that has not changed. Pork STILL contains well-named enzymes like cadaverene and putrescene. Pig DNA is STILL unique in that it is so close to ours that far more disease organisms can "jump the species barrier" and cause us harm than any other creature now considered "food" by some. Almost every virulent flu epidemic or pandemic can be traced to that source. The stories of deaths attributed to shellfish similarly attests to the fact that God knows more about what He designed us to eat than the gourmets on FoodTV.
I long ago concluded that when Torah-literate Jews like Paul used the Hebrew, or even Greek, words for "food", or "meat", they knew that their intent simply did NOT include things that God clearly did not intend to be "food", any more than we would mean to include dog feces in our definition when we use the English word food. But you could probably eat 'em, if you choose to. As for me and my house...
My own old joke still summarizes the point. Eating pork or shellfish won't affect what happens when you die - just how long it may take.)
He says that He gave us His teaching and instruction for our own good, for blessing. I have found that to be very true.
As to the "Old" and "New" distinctions - I am not a fan of that pop theology terminology, either. There have been a number of Covenants that God made with man, from Adam, to Noah, to Abraham, not to mention the one that He told Jeremiah of. The fact that man has "broken" them does not, and never did, mean that God does not continue, as always, to honor His Covenants.
(Seen any rainbows lately?)
Our God is a Covenant-keeper; His Word is True; He changes not.