People who feel weak spiritually are also those more likely to find fault in others and cling to the organisation. Your wife still believes but also thinks she is not doing enough this makes her vaccilate between sinning and then guilt and wanting to be more spiritual. But she is also looking for someone to blame as it is easier than facing her shortcomings.
In addition this is the season when JWs feel most isolated from the world and most different. The place where you get validation at this time of the year is the Kingdom Hall so it is not surprising she is making noises about meetings.
This is not a time to make any decisions or force any issues especially as you are at the start of your journey in relative terms. Why has your wife started smoking? And why does she not feel the need to confess to the elders? She is quite a contradiction and things may not be as hopeless as you think. As it is early days it is important to invest in your relationship rather than force the issue of religion.