These are early days and nothing for now is certain. It is possible to leave with some family intact but not an easy thing to accomplish. I was in the position of your wife with a doubting husband and children to consider. I had concerns about the way JW teachings were causing them harm and making them socially isolated and that the meetings were often inappropriate and were very disruptive to them making it hard to establish bedtime routines.
My advice is approach your doubts gently and don't try and tell her all you have discovered in one go. Ask her how she feels about the way children taught and the implications of the decisions we make for them. As a mother she will be aware of how poorly children are catered for at meetings and how children are isolated from their peer group. Every mother wants their children to be happy and the society does not make happy children. Isn't it odd how many parents take their children to the hall to shout at them. There are also many couples who gave up having children wanting to wait until the new order, these people are now dying so have no hope of future families.
Using expressions like you are concerned the society may have lost it's way is a gentler way of saying the GB are a bunch of lying hypocrites and less threatening.
I wish you well for your future it will resolve itself. Exiting as a family is a blessing and will enhance your lives.