Umm, Spade, I think you've overlooked something important.
... Jeremiah 25:3-11
At the time when this was stated, Neb·u·chad·rez′zar, the king of Babylon represented supreme rulership.
"'The tree that you beheld, that grew great and became strong ... it is you, O king, because you have grown great and become strong, and your grandeur has grown great and reached to the heavens, and your rulership to the extremity of the earth. Daniel 4:20-22
That it why these nations (plural) was used instead of this nation, but the direct application of the prophecy was primarily concerned with the nation of Israel as they were the only nation that was completely subdued and taken into captivity.
At the time the prophecy of Jer. 25 was stated, it was the fourth year of king Jehoiakim, the first year of King Nebuchadnezzar. Context!
(Jeremiah 25:1-3) . . .The word that occurred to Jeremiah concerning all the people of Judah in the fourth year of Jehoi′akim the son of Josi′ah, the king of Judah, that is, the first year of Nebuchadrez′zar the king of Babylon; which Jeremiah the prophet spoke concerning all the people of Judah and concerning all the inhabitants of Jerusalem, saying:
"From the thirteenth year of Josi′ah the son of A′mon, the king of Judah, and down to this day, these twenty-three years the word of Jehovah has occurred to me. . . [etc.]
That would be 604 BCE (or 624 BCE, WT reckoning). Now, you seem to be connecting this time-frame with the Dan. 4 'tree dream,' where Nebuchadnezzar represents "supreme rulership." However, according to WTS doctrine, Nebuchadnezzar wasn't 'supreme ruler' in the 'tree dream' sense in his first year when Jeremiah gave the prophecy. Therefore, MeanMrMustard's points stand.