If the Watchtower Bible and Tract Society has really been lifted up above the mountains and all the nations are streaming to it, wouldn't their conduct reflect this? I mean, you can point back to errors in other organizational arrangements all you want, the fact remains that the administration at the full limit of the appointed times would be MUCH improved over those inferior shadows not just in scale and scope, but also morally.
As late as 2001 they were willingly an affiliate, associate, partner, colleague, subordinate organization attached to the UN/DPI as an NGO - a status they claimed made Christendom subject for destruction by God. If I refused to give up a membership to the Gymnasium Division of the YMCA I would be disfellowshipped for apostasy.
They are still teaching things that directly contradict the Bible: (ex: http://www.jehovahs-witness.com/9/84617/1430686/post.ashx#1430686)
They have an organizational model that removes Jehovah's spirit from the individual and from the "class" that is supposed to be teaching us truth. Jesus plainly stated that the spirit of the truth would teach individuals - NOT organizations. (John 15-16)
They still advise relying more heavily on the admittedly uninspired word of men than on the Bible, thereby asking adherents to - in effect - "put their trust in nobles and the sons of earthling men."
These are a few very simple things to demonstrate. In my opinion, without confidence in the organization, confidence in the promises made by the organization would erode on its own. I see no need to strip confidence in God or the Bible from people who are just waking up.
Respectfully,
OldSoul