Ah. A totally unique list. The RCC disagrees with it. The Anglican Church disagrees with it. In fact, none but your one singular denomination agrees with that list. What about 4 Maccabees accepted by the Georgian Orthodox Church? What about Psalm 152?
What about 2nd Esdras? It seems to refer directly to the Septuagint yet 2nd Esdras is not included in the Septuagint yet again protestants and non protestants at the time and even now (RCC AND EOC) include it as Apocryphal.. here's where it gets interesting..
"Make public the twenty-four books that you wrote first, and let the worthy and the unworthy read them; but keep the seventy that were written last, in order to give them to the wise among your people." (2 Esdras 14:45–46 RSV; 4 Ezra 12:45–46)
Within the 4th Esdras (2nd Esdras) there is a bold prophesy that probably would leave even these "wise Jews" scratching their head...
7:28, 2 esdras
"For my son Jesus shall be revealed with those that be with him, and they that remain shall rejoice within four hundred years. After these years shall my son Christ die, and all men that have life. And the world shall be turned into the old silence seven days, like as in the former judgments: so that no man shall remain. And after seven days the world, that yet awaketh not, shall be raised up, and that shall die that is corrupt And the earth shall restore those that are asleep in her, and so shall the dust those that dwell in silence, and the secret places shall deliver those souls that were committed unto them. And the most High shall appear upon the seat of judgment, and misery shall pass away, and the long suffering shall have an end:* But judgment only shall remain, truth shall stand, and faith shall wax strong:*And the work shall follow, and the reward shall be shewed, and the good deeds shall be of force, and wicked deeds shall bear no rule.*Then said I, Abraham prayed first for the Sodomites, and Moses for the fathers that sinned in the wilderness:*And Jesus after him for Israel in the time of Achan: And Samuel and David for the destruction: and Solomon for them that should come to the sanctuary:"
If you consider the context of the "make not public..." verses as fact, this would mean that the prophet was instructed to keep hidden this specific revelation aside from already keeping the Septuagint (70) in close quarters (pre Christian Scribes and devotees, humble Jews in Gods eye kept hidden from the hard hearted sects of Judaism).. this could play a role in why only the "Wise" could quote verbatim and mention customs that no other OT books could (Jesus, disciples and Apostles), explaining why these books (70) were so "secret" just before the first coming of the Lord.
I find this hypothesis to be practical for a time, Revelation speaks of keeping the women hidden and we know that God hides things for a time and reveals them later.
What if there were truth to this? Is it not suspicious at all why the books became obscure? Was the bold prophesy in a few verses a good reason to hide away such a vast amount of books?
We may never know for certain because God works in mysterious ways that cannot be explained, but I don't buy that the books were dropped because they were non inspired and stupid books when early Christians (Jew and Gentile) referenced them and accepted them as inspired.
The scribes and pharisees might have wanted to sweep the Septuagint under the rug after they stumbled across the prophesy of Christ written in thereof and seeing that the prophesy came true -they forbade them along with the NT and that was the end of that...?