@SLA one foot weighting- do you mean back-loading? As per power hitting/ baseball thoughts?
There are similarities, but the purpose is different. Back-loading and a rigid front leg are techniques used to involve the core muscles in hitting and add power and bat-speed, whereas one-foot weighting is used to simplify decision making/decrease the amount of separate movements you have to make before hitting the ball.
For example, if you start with your weight balanced across both feet, the sequence of events before you hit the ball is:
Front foot shot:
Put weight on back foot -> lift front foot -> lean forward -> plant front foot -> play shot
Back foot shot:
Put weight on front foot -> lift back foot -> push back foot back -> plant back foot -> play shot
Whereas if you already have all your weight on the back foot, the sequence is shorter:
Front foot shot:
lift front foot -> lean forward -> plant front foot -> play shot
Back foot shot:
lean in to cut/rotate to pull -> play shot
Of course, this requires your back foot to be planted in a position from which you can comfortably play a back foot shot without any additional foot movement, eg, slightly back and across, a position from which you can defend, drive, glance, cut and pull all without moving your feet. If you watch pros, you'll see they don't actually move back to play back foot shots.