One last comment for your sake Ghost.... The foot and leg steering methods commonly employed throughout PSIA and from Rick it would seem, are very applicable as you get to the left side of the diagram I showed. Contrary to Rick's accusations of what I teach and ski myself, I am not at all opposed to twisting the legs to do extra pivoty skiing, and sometimes tactics dictate that. Its a mistake to lump me into some camp that preaches dogma about one side or the other. Pivot slips, short swing turns, highly pivoty skiing, there is a place for it and I even teach pivoty things sometimes! (gasp).
But make no mistake, those kinds of rotational movements will tend to flatten the ski and reduce carving effectiveness. The results will tend to be towards the left side of my diagram. They also tend to be dysnfunctional as speeds go up, and not even very much faster. Flatter skis don't turn much at fast speeds they just drift around. If you're going super slow, you can use big steering angles on a flatter ski with a bit more success.
If you want to ski on the right half of my diagram, then you need to tip and carve and use the sidecut, as you described well in your last post, and yes, avoiding ski rotary is part of the secret to carving well in that zone, and quite a bit of turn size shaping is possible in this mode too! Way more than PSIA and other folks such as perhaps Rick may try to make us all believe. Don't get me wrong, your femur still needs to be loose in the hip socket. it rotates there. The difference, as you have observed on this forum before, is about allowing the femur to spin around, vs forcing the ski to be torqued or spun around; with more of a focus on tipping, edging, pressure, balance and getting the sidecut to perform....ie......CARVE.
There is not one size that fits all, all rotary or no-rotary...but pivoters will end up on the left half of my diagram and carvers will end up on the right side. Its that simple. More control all over the mountain, particularly with even some moderate speed, will come on the right half, that is where the edges are more engaged and providing control with the snow. The left half is more about flatter and skiddier skis which are more like bald tires on a car.