A two plane swing manipulates the shaft on plane by rotating the club. The one plane swing is more athletic and naturally places the club on the correct swing and shoulder path, which is better for women and requires less maintenance.
Use the same putting technique for all your simple chips around the green and just manage distance by your club selection
Developing resistance on the through swing of your pitch shots is critical for control, this retraction drill will also keep your club accelerating, avoiding the biggest mistake in pitching which is a decelerating clubhead