Daniel,
May I ask, why has your wife left? It does not seem she has "scriptural grounds" for leaving. Have the elders spoken to her? If so, since you are still married, make sure YOU are present. In a very male centric order such as this religion, she technically cannot meet with them without you, at your direction, and if she does and they do.......they are in trouble. Do not forget that.
If she left because she knows how you feel about some things, point out to the elders that you have never impeeded her spiritual progress, and you simply shared what was on your mind with your wife. You have been providing faithfully, you have not been abusive....on what scriptural grounds is she not being publicly reproved for abandoning her husband right now!
You need to decide what you want to do, and then go from there. Stop being so open with everyone. its the same mistake so much of us made or are making. When I had the lynch mob after me, they asked me a similar question (before it went completely off the rails), and I showed them matthew and Jesus having all authority in heaven and earth. i set it on the table, and said that is what I believe. As it went on I showed them james, and how if I go against my conscience it is a sin for me. Are they asking me to go against my conscience?