There can be some dramatic changes in your movements to really take advantage of the new technology built into the skis. I've been teaching for 15 years and the pinnacle of my ski lenght journey was some Fischer RC4 WC Slalom skis at 203 cm. I'm 5'7", about 175-180 and these were ridiculously long, but that was the deal at the time. I now ski on something between 156 and 169, depending on the kind of ski and what I'm doing with them. So, here are some highlights:
Stance - hip width, with feet under you. Ankle lock - just don't do it!
Rotary movements - the big twist and pivot of the 80s is gone, it's not needed. We had to extend our bodies up, get a flat ski and twist them to get the turn started. These movements aren't needed any longer.
Pressure control movements - applies to bending and flexing or extending our legs, using ankle, knee, and hip joints - the up/down movement which in many cases was a pop up to get weight off the ski and to flat should now be directed down the hill instead of straight up and down.
Edging movements - rolling the skis from one set of edges to the other can be accomplished by directing the hips/center of mass toward the tip of the new inside ski. Driving the knee to help create angles, or making an "A" frame isn't needed. The outside knee used to be tucked in behind the inside knee. Ineffective now to do this.
The tips of your new skis are much wider and less is needed to get the edge of the ski engaged. Explore these movement changes to see just what is needed. Most of all, I'd take a lesson that focueses on just what you've asked, moving from one style of skiing to another.