Jesus is reigning on his heavenly throne NOW, but will eventually be giving the authority back to his father. (Therefore, we need to keep Jehovah above Jesus).
There is no disagreement the Father is greater than the Son. The issue is that JWs don't do what Jesus said to do.
For example, here's a rare scripture in JW land:
For the Father judges no one at all, but he has entrusted all the judging to the Son, so that all may honor the Son just as they honor the Father. Whoever does not honor the Son does not honor the Father who sent him. - John 5:22,23
How can one be honoring the Son if they continue to do an end-run around him? And how about this?
Jesus said to him: “I am the way and the truth and the life. No one comes to the Father except through me." - John 14:6
Ask a JW what that means, and they'll likely say, 'we pray in Jesus name'. Is that what it means? Have you ever been told to go to a particular person for something, but you ignore it and go over his head? How do you think either of those people feel about that? Didn't God give Jesus a covenant for a kingdom? (Luke 22:29) Didn't he give Jesus all authority in heaven and on earth? (Matt 28:18) And especially in relation to the congregation? (Eph 1:22) Didn't God say to listen to his son? (Matt 17:5)
And so if we're doing an end-run around and saying the congregation is directed by God and that this is "God's visible organization", isn't that doing the opposite of what God said and inspired writers to say? Even the apostles had the clear idea that all things belong to us, we belong to Christ, Christ belongs to God. (Eph 3:21-23)