SO a few years later:
It's summer, so I can't test my idea, so I'm asking for opinions.
For the last couple of years, I've been working on flex to release turns, and am very happy how it changed my skiing.
I am also working on brushed carve turns, which to me means no rotation, but less edge angle throughout the turn.
So, with wide skis (112), skiing powder in a narrow couloir (3-4 meters wide), how do you think a brushed carve turn would work?
I am thinking that less edge angle would make it easier to slide the ski at the end of the turn, and make it easier to start the next turn. It seems that a lot of edge in deep snow would cause the skis to want to keep turning, at a larger turn radius than I would want in a narrow couloir.
I would normally just go out and try this, but it's dry here and now.