Should PP#3 be rotated to a slightly "stronger" position for Hitting's cross-line approach?
No. Armourall2. Pressure Point #3 remains Aft of the Shaft in order to comply with 1-L-#10 and #11.
I think that's where I'm confusing myself. If the Plane Line is rotated Closed (to Right Field) for the Cross Line Angle of Approach procedure, wouldn't Pressure Point #3 rotate with it, and point to Right Field as well?
Yes. Again, Clubhead Force and Motion should always be On Plane at right angles to the Clubshaft and Sweet Spot.