The alignment to the club into the downswing is important for controlling the clubface, the shaft, and the handle. When you go from the P4 position, the lower body is going to fire first while the upper body stays stable. As that happens, increase the flexing in the clubface so that the face is going to get square early. When you come down into that P6 position, you’ll have the sweet spot behind the hand path.
In the best ball strikers, as they come into impact, they slightly losing the angle between the club shaft and the wrists. That’s called ulnar deviation. The club unhinges and starts to square up, this creates a lot of speed. Through here, the lead wrist is slightly flexed but working towards extension. As you come through both arms go straight and the club is uncocked. When you turn through into the follow through the club will rehinge.