Rather than a “lackluster” its is one of the most important phrases in the Bible because, as you note, its about people from the gentile nations turning away from pagan gods named Zeus, Isis, Apollo, Diana, Hermes, Jupiter, Ares, Amon, etc. etc., to worship the “true God” that Jesus prayed to at:-
Texts from ‘The Divine Name King James Bible’ (DNKJB) & The N.W.T..
DNKJB John 17:3 “And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent.( Isa 43:11; Mrk 12:11 ).”
NWT John 17:3 “This means everlasting life, their coming to know you, the only true God, and the one whom you sent, Jesus Christ.”
As you also note The Jews were to “seek the LORD (Heb. "YHWH")” examples at:-
DNKJB Jer. 50:4 “In those days, and in that time, saith Jehovah, the children of Israel shall come, they and the children of Judah together, going and weeping: they shall go, and seek Jehovah their God.”
NWT Jeremiah 50:4 “They will weep as they walk, and together they will seek Jehovah their God.”
DNKJB Zec. 8:20-22 "Thus saith Jehovah of hosts; It shall yet come to pass, that there shall come people, and the inhabitants of many cities: 21 And the inhabitants of one city shall go to another, saying, Let us go speedily to pray before Jehovah, and to seek Jehovah of hosts: I will go also. 22 Yea, many people and strong nations shall come to seek Jehovah of hosts in Jerusalem, and to pray before Jehovah. "
NWT Zechariah 8:20-22 ““This is what Jehovah of armies says, ‘It will yet come to pass that peoples and the inhabitants of many cities will come; 21 and the inhabitants of one city will go to those of another and say: “Let us earnestly go to beg for the favor of Jehovah and to seek Jehovah of armies. I am also going.” 22 And many peoples and mighty nations will come to seek Jehovah of armies in Jerusalem and to beg for the favor of Jehovah.’”
As the Jews had left the worship of the true God and turned to pagan gods named Baal, Chemosh, Molech, Ishtar etc. etc., so Jehovah (“The LORD”) called them back to him so as to gain forgiveness and worship him again. This was the situation in the first century but now God was reaching out to the gentile nations to turn away from the worship of false gods to the worship of him as the almighty and true God whom Jesus prayed to in John Ch. 17 on the behalf of the Jews and Gentiles that followed him. Acts Ch. 15 is an example of recounting how the prophecy of Amos 9:11-12 (see below) was being fulfilled in that the Gentiles turned away from pagan gods to the worship of Jehovah.
DNKJB Acts 15:17 That the residue of men might seek after the LORD, and all the Gentiles, upon whom my name is called, saith the LORD, ( Jehovah Amo 9:11, 12 ) who doeth all these things.”
NWT Acts 15:17 “…so that the men who remain may earnestly seek Jehovah, together with people of all the nations, people who are called by my name, says Jehovah, who is doing these things,”
DNKJB Amos 9:11 In that day will I raise up the tabernacle of David that is fallen, and close up the breaches thereof; and I will raise up his ruins, and I will build it as in the days of old: 12 That they may possess the remnant of Edom, and of all the heathen, which are called by my name, saith Jehovah that doeth this.( Act 15:16,17 ).”
This was after the time when salvation had been preached to the Gentiles by Paul and other apostles, c.49 C.E.:-
DNKJB Acts 15:12 “Then all the multitude kept silence, and gave audience to Barnabas and Paul, declaring what miracles and wonders God had wrought among the Gentiles by them.”
NWT Acts 15:12 “At that the entire group became silent, and they began to listen to Barnabas and Paul relate the many signs and wonders that God had done through them among the nations."