Sounds like you're describing open stance.
I already do that. Simple. Turn your shoulders during takeback.
But, I am talking about turning the feet to point sideways (neutral/closed), not at the net (open)
To do that, you need to STEP, which is not easy while a ball is coming at you.
We've established that a full turn is allowed to have you step backwards, not just stepping towards the ball
Who told you to do that?
You either turn the shoulders and go open stance or do the same sequence and add a step IN FRONT for a neutral stance. You never ever turn your whole body at once as a unit. The only difference Is the distribution of the wight on your outside leg: open stance -> weight on the outside foot + leg pushes up vs neutral -> outside leg helps bring your center of gravity above the front foot + front foot anchors your weight down and in front.
Of course if you're in a lateral sprint, ok your body is totally sideways but you're supposed to avoid that situation.