Fix Your Thin Shots
If your ball position is too far forward in your stance, you will catch it thin. When the ball is too far forward in your stance, your weight shifts back as you turn back, and the club bottoms out before it reaches the golf ball. After it bottoms out, the club moves up and through impact.
Move your ball position back to the center, just right of your belt buckle. Try out this new ball position and look where the club reaches impact. If you start taking too much turf, move the ball up one position to your middle of the stance.