This seems to be a problem that has been going on for more than a short time. If I were to guess -- other than physical sobriety -- I wouldn't guess that she has "what you want."
So, my questions I would ask myself, if I were in a similar situation is:
1. Why has it gone on this long?
2. Do I want what the sponsor has?
3. Does the sponsor know how to use the tools -- to solve her problems?
4. If she does know how to use the tools to solve her problems -- then, why isn't she using them?
It is possible to "out grow" a sponsor. However, if I look back at Bill W.'s experience -- even though Ebby couldn't stay sober -- Bill always referred to Ebby as his sponsor. So, there is definitely more than one or two ways to look at a situation w/ a sponsor.
What I would do, if I were in your situation:
I would take my written inventory of my resentments, and fears -- on the sponsor -- and attempt to do a 5th Step with her on it.
Doing that -- I would have done my part. And, I would reserve making a decision until after that. At some point, you'll need to resolve the problem w/ her regardless of what you do. At least, you'll need to do your part -- to resolve it w/ her. So that you'll feel comfortable in saying to yourself "I did my best with this situation."
Since you meet w/ her tomorrow. How about trying that -- and then, check back in tomorrow night, here, and let me know the outcome. If the problem doesn't get solved -- I'll suggest a plan B.
What do you think?