Feet and Hips? Cross and rear hand hook?

[OMGWTF]

For the cross where should my hips and feet stop?

If I twist my foot and stop twisting my foot when its pointing dead ahead my punch goes dead straight from my shoulder, if I rotate my foot even further and inwards my hips lock out I almost change stances from left to right and my punch goes diagonally foward instead of dead ahead.

Which is the proper way to throw the rear cross? If both are ok should I be able to rotate my hips fully without moving my feet much at all?

I feel like when I stop my rear foot so its pointing dead ahead I get more leg drive than when I rotate it all the way in and lock my hips out but I get more rotational power if I fully lock my hips out and turn my foot in.

Lastly for a rear arm hook should I rotate my hips and feet all the way fully so I againt almost switch stances?

This is from a classic stance (side on) and a slightly more square front on 3/4 stance)