While researching this subject I thought you might be interested in the latest word from the GB about the GB.
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From Organized to Accomplish Jehovah's Will (OD Book) Chapter 3, pages 17, 18:
THE ROLE OF THE GOVERNING BODY"The faithful and discreet slave" seeks to preserve unity and makes it possible organizationally for 'all things to take place decently and by arrangement.' (1 Cor. 14:40) To accomplish this in the first century, a group of anointed Christians from among the faithful and discreet slave class were chosen as its representatives.
As such, they did not consult with all anointed elders in the world before making decisions. From their position in the Jerusalem congregation, they served as a governing body for the entire anointed Christian congregation.
From Pentecost 33 C.E. onward, the faithful apostles of the Lord Jesus Christ took the lead in providing direction for the newly founded Christian congregation. (Acts 4:33, 35, 37; 5:18, 29) By about the year 49 C.E., this governing body had been enlarged to include more than Jesus' apostles. When the circumcision issue was decided, that body included "the apostles and older men in Jerusalem." (Acts 15:1, 2) It was their responsibility to consider matters affecting Christians everywhere. They sent out letters and decrees, all of which strengthened the congregations and made it possible for the disciples to remain united in thought and action. The congregations followed the direction of the governing body, and as a result, they received Jehovah's blessing and prospered.-Acts 8:1,14,15; 15:22-31; 16:4, 5.
The value of such an arrangement is evident today. The anointed ones making up the present-day Governing Body of Jehovah's Witnesses have decades of faithful service and theocratic experience behind them. They offer spiritual direction to Jehovah's people, as did the first-century governing body. The Governing Body also continues to carry the responsibility of overseeing the preaching work, producing Bible study material, and arranging for the appointment of overseers to serve in various capacities in the organization. These are some of the Kingdom interests of Christ that are being cared for today. Like the early Christians, we gladly look to spiritually mature men for Bible-based direction and guidance in matters of worship.
As was true in the first century, the Governing Body today is made up of imperfect men. However, Jehovah has used imperfect humans in the past to accomplish his will. He instructed Noah to build an ark and to preach about the coming destruction of his day. (Gen. 6:13, 14, 22; 2 Pet. 2:5) Moses was appointed to lead Jehovah's people out of Egypt. (Ex. 3:10) Imperfect men were inspired to write the Bible. (2 Tim. 3:16; 2 Pet. 1:21) Jehovah's use of imperfect men today to direct the preaching and disciple-making work does not weaken our confidence in God's organization. Rather, we are strengthened because we know that without Jehovah's backing, the Governing Body could never accomplish all that they do.