Just my thoughts.... my Mrs still has her moments of wanting to beleive. But I recognise that it's not the religion she wants, it's belonging, acceptance, a hope (dream) and stuff like that. I need to be able to provide those things from a worldly source.
One of the problems with talking about the problems with the WTS (607/1914/1975, blood, UN NGO, abuse, etc etc etc) is that there's a 'word answer' to everything. By that I mean a set of words which you can't prove to be wrong that, if true, would resolve the problem.
The ultimate, last resort 'word answer' is '...well, we'll have to wait on Jehovah to sort that one out...'. You can't prove that this is wrong, silly, imporssible, won't work or anything else! If true, it would (supposedly) fix any problem at all!!
I'd suggest that you'd be better off to talk about how you want your life at home to be, not their religion.
Think of three things you want at home - not three things you DON'T want, but three things you can get... You and your wife to do a Community college course together, go to Vegas one weekend soon, go camping, hiking, or work cleaning up a river once a month, equal time on religion - 5 minutes of JW talk to you or the kids gives you 5 minutes to say what you want to, ... whatever's achievable in your house.
Why not cancel the elders, get out the barbie, cook up a fatty, tasty brunch with bacon and hash drowns and all that, brew some special coffee from Brazil or someplace and just talk with your wife and kids about how you want to live (not how bad the religion is)?
Maybe pack a suitcase and book a hotel room too, just in case... if things are that bad, then you can only be prepared for the worst case if you expect it to happen and have a plan to live through it.
Take care, Max