AA would be absolutely useless for religious growth. It's not in that business and all members are free to pursue whatever religious path they choose, or none at all.
The fundamental principle in AA to enlarge and perfect our spritual life is self sacrifice and service to others. The price of sobriety is the destruction of self centredness. I have heard AA referred to as a spiritual kindergarten. Perhaps that is where we commence our spiritual education. Many members pursue outside sources of spiritual growth and understanding, ranging from the wide range of litterature available to attending retreats, often run by ordained religious people who provide counsel and advice on spiritual matters regardless of your personal religion or lack of one.