When I do anything more than try to swing smoothly, it magnifies my problem and causes a big slice every time.
I think getting too much hip turn is hurting me somewhat but I think it might be caused more by allowing my weight to get on the right side of my right leg allowing my right leg to buckle out. I've been working on turning more and keeping the weight on the inside of my right leg, and when I do it right, my hips don't turn as much naturally because my knee stays more or less where it's at. So, I think the hip turn issue might be more of a symptom rather than a cause, but that's just my guess.