I wonder if OP is one of the governing body who knows it's wrong and trying to come up with ways to fix it and keep it intact lol.
I don't remember if it was Rutherford or Russell, but early magazines were written about how organized religion is of Satan and they gave their points as to why. Shortly later they became what they were teaching was of Satan.
Anyway, here is my input on what should be done if the religion was rebooted. But first, I'll list and state why I don't think that scriptually there will be a one worldwide religion prior to the 1000 year reign or new world, etc.
The scriptures say, Jesus didn't say to seek out one group of people, but the only identifying mark is they have love among themselves. That the weeds and wheat will grow together until the harvest.
That the body of Christ has many different parts, which do different things, but as a whole they accomplish his work. In this point, it would be impossible for one organization who is focused on one thing to be able to accomplish everything. JW's focus only on preaching. Yet the scriptures have commandments on feeding and helping the poor, widows, fatherless boys, etc. So for JW's to say they are the only ones who do preaching so they are the true one is wrong. They don't do anything for helping poor. Salvation army is doing God's work of helping them however. Worldwide even in non christian cultures God can move people and there are people who are christlike in all cultures and religions. Those are who are judged who don't know the law but by nature do the things of the law and have it written in their hearts.
Now to get to specifics with JW's.
First, the governing body say they are not inspired, they can't say that then at the same time say everyone must obey them as if Jehovah himself and those who don't follow their direction are rebelling against God. If God was using them like Moses or any inspired ones, then they would not have been wrong about the generations, the resurrection, not marrying, not getting employment, and all the other changes. They need to admit those mistakes, admit that disfellowshippings were human decisions and not from God, and allow spiritual freedom. Spiritual freedom means one puts the bible and their conscience above what any other human tells them is right or wrong.
Shunning policy is a major twisting of scriptures. It's for those who are active members who profess. So for example of a member was activly commiting adultury and told all he won't stop, he can do stuff w/ any married women he wants, then he would be shunned by members, only until stopping and repenting. This has absolutely nothing to do with God forgiving him or not, that is between him and God. But this just shows that members won't tolerate that and it's not acceptable for those who consider themselves to be apart of them. However if he was to leave the religion, he is no longer professing to be a member, so he would be treated like any other worldly person. (not shunned, just a non believer). General sins, elders or older men can help pray, console, encourage, but they have no place to judge. Tons of scriptures talk about not judgeing. The only time Paul said to judge was a man who was with his father's wife, (something against another person and in everyones face, vs just sin that was personal and not hurting anybody, etc)
The scriptures on never talking to somebody or taking them into your home.....that's specifically talking about the antichrist and more specficially those trying to persuade that Christ never came to Earth. So one who doesn't believe, that's their business, but those trying to teach that, don't talk to them. (this is again just going strictly based on what the scriptures in the bible say)
The early christians helped their elderly and poor. The WT is horrible, not only did they give commands to not prepare for retirement and better education promising those would never need them because the end was so close, with all the money they get they don't help any who are in dire conditions because of that. The early christians helped themselves and others. Other churches do the same, helping their own under bad times and non members too.
Another major thing, is association, parties, gatherings, etc. Not only does the WT teach to not associate with any outsiders, but also that it's bad to associate with insiders. You'd think with such a small number of possibly associates, they would have weekly or biweekly gatherings. The assembly halls w/ all their lands could have volleyball, BBQ, etc setup and the whole religion as not only worship together but associate together.
Other churches are always having social events together and this shouldn't be discouraged but encouraged.
Higher education and planning for retirement should be encouraged. The end can come at any time, it's hoped in their lifetime, but plan for the worst and hope for the best type attitude.
Meetings and study should not be studying another persons comments and reasoning and just repeating what they said in the watchtower. A true bible study would be reading a set of scriptures IN CONTEXT, and discussing what they mean. Any audience participation should be based on free thought and no 2 answers will be the same vs read a paragraph then ask a question then reread a phrase in the paragraph as the answer.
Most of the people in the religion are good people, can fixing it happen while keeping them together.