Weight transfer has nothing to do with power or control. Weight transfer is the component of balance just like when you're walking, you move from your right leg to your left leg and back to right. That is weight transfer. However it has nothing to do with nor does it generate power.
In this video, we can see Patrick Mouratoglou hitting a forehand with an open stance. I've covered it enough, hitting the ball with an open stance leading with the heel is biomechanically incorrect. What is correct is his movement forward into the shot, in the direction of hitting the ball.
The primary difference between weight transfer and power is the creation of energy. In weight transfer, you are distributing energy which already exists. In a power stroke, you are creating power from the ground, and pushing it into the ball at the point of contact.
The primary difference between weight transfer and power is the creation of energy. In weight transfer, you are distributing energy which already exists. In a power stroke, you are creating power from the ground, and pushing it into the ball at the point of contact.