I would say to focus on the front elbow back at impact. Many times it is the culprit. You setup with that elbow pointing back at the front hip, but then on the downswing, sometimes the shaft gets out of alignment with the front arm, and by impact the front elbow is pointing at the target, with the shaft parallel to the target line (this is not right and will need a fix by impact… result, is the face opens (various degrees).
When I make the most solid contact through impact, I do not feel like the shaft is parallel to the target line just before impact, I feel like the shaft is still in line with the front arm, going left as I rotate. Not sure if this makes sense, but it again, possibly (your slight fade), has to do with the front elbow in incorrect position through impact.