From my own personal experience, I'd say: continue doing what you are doing. I know that it hard fo you, but please don't flood her with too much. Let her put two and two together, she will get it in time.
I believe once she realized that the governing body is not guided by holy spirit and that these men are not God's spokesman, then the house of cards will fall for her.
When I was at your wife's stage, I would complain about things in the congregation and blaming the local brothers . My husband would say : do you think its a local problem or systemic? Do you think the local brothers are to blame or are they acting on suggestions from the governing body.? This type of reasoning helped me to see the bigger picture. Once I realized who the Wizard behind the curtain was--everything fell in place.