"I almost slipped and gave what would have been a controversial personal opinion."
Nice to read how fast things are changing for you. If you don't want this slips happen again, you will have to rehearse more. On the other hand, you are in a unique position, you might as well use this opportunity to the full. You might plan ahead for reversing slips without really disproving them. We have a MS in our congo who is quite an expert in this. In the discussion of the famous WT 15/09/2010 article, after the par 8, he answered: "You could say now that the Governing body members are the leaders of the Jehovah's Witnesses as the pope is for Catholics, but that is not the case." Things like these might help some of your congo to wake up as well. On another occasion he mentioned that there was a 'widespread controversy in the "world" about the year the babylonians destroyed Jerusalem'. This might help others to start doing their own research. If you are a COBOE you can assign yourselves whatever you want, and otherwise you can change with other elders parts you cannot give. In worst case faking depression and 'fear of the platform' might provide a way out.
I am very happy I was not a MS any more when I woke up. I cannot get myself to preach to strangers "the good news" any more, let alone defend doctrines I have come to despise from the platform. No matter which way you decide, more effort will be required. The least you will have to do is research every assignment as soon as you know of it, and if you cannot do it, swap with another elder, for whatever reason (project at work, holiday,etc..).