Couple of comments for you:
I agree that the GB doesn't have apostolic authority but as a lifelong JW and having served as an elder (stepped down a couple of years ago because I could not support teaching things I didn't agree with such as the generation teaching and 1914, etc - still attending meetings) I always believed that JWs were the restoration of "true Christianity" and that the GB was functioning in a similar fashion as the apostles did in the first century. I don't have specific WT quotes at my fingertips but that is certainly inferred if not directly stated. The 1919 appointment of the WTS reps as the faithful and discreet slave teaching seems to indicate that while they don't have "gifts" of prophecy it was not because Holy Spirit wasn't using them, it was because all the prophecy necessary was already given. But, the decisions rendered by the GB are given the same weight as decisions rendered by the apostlic counsel in Acts. Are you saying that's not the case? Just curious because every JW I know believes that disobeying the GB is akin to disobeying Jehovah.
Regarding whether they are a false prophet, I agree with you that they have misinterpretated prophecy but have never really put something new out there. However, the weight of their misinterpretation is serious and the repercussions of disagreeing with their interpretation is above and beyond anything written in Scripture. So, in this way, I think they have overstepped their bounds. For example, if I were to report to my local BOE that I do not believe that Jesus presence began in 1914, I could be disfellowshipped. Harboring even private doubts (according to the Flock book) are a basis for judicial action. Do you think Paul (someone with full apostilic authority) would have treated someone like that. Did Jesus disavow Peter for denying him or Thomas for asking him to prove that it was really him? So, if those guys didn't drop the hammer, how is it that the WTS can demand such obiedence?
A study of early Christianity will show that the first century congregations did not have the high level of organization that we see within the WTS today. Paul undertook missionary missions at the direction of Jesus, not the congregation in Jerusalem. The name Christian came from Antioch not the apostlic counsel. I agree that the Scriptures do talk about folks taking the lead in the congregations, but disagree that it mandates the level of control exercised by the WTS.
The basic premise of the religion is that Jesus returned in 1914 (according the prophesy based on a timeframe mentioned in Daniel and tied to the destruction of Jerusalem by Bablyon) and that he inspected all religions that claimed to be his followers on earth. Out of all the religions, he choose what is now JWs because at that time, they were teaching the closest thing to the "truth". Since 1919, JWs have functioned as the earthly part of God's Organization. If the basic premise is true, the rest doesn't really matter. If it's not true, then the religion is just like any other religion.
After investigating, I've come to the conclusion that the basic premise isn't true because:
1) there is nothing in Daniel that would even hint that the 7 times could be applied anything beyond the initial prophsey (that Neb would be brought down for 7 years and then restored, which is what happened).
2) there is no evidence that Jerusalem was destroyed in 607. Rather all available evidence points to 20 years earlier. And, there is a wealth of documents and records, none of which indicate the missing 20 years.
3) there is no evidence of any direct involvement from God regarding the operation of the organization. Every other time Jehovah used a group of folks or an individual, there was direct involvement (Noah, Moses, Jacob, nation of Israel, apostles). Can you give me an example from the Bible where someone was used by God and could not point to some supernatural proof? I would expect that the restoration of the true Christian faith would have some sort of evidence of divine approval. Isn't that a reasonable expectation?
If it could be proved to me that the basic premise is in fact true, I'd return to being an elder and aggressively pushing the WTS as God's organization. Sorry for the length and I'm glad you're here having a discussion.