My advice is if something works and your happy with it don't change it. I really wouldn't worry about it unless it becomes a problem.
At night when first going to sleep she on her own stopped needing the breast and settled herself. But thru the night she still needed the breast to resettle until we decided to cut down night time feeds and settle by patting, cuddling but as your son already sleeps well overnight thats not really a prob.
Our main prob we had was daytime sleep she stopped using the breast to settle and was hard to settle and we used a modified version of CC involving patting and picking up/ lying down.