I've been playing with the edges on my latest experiment. I am surprised how much tuning can occur with a little bit of Superfil and some sandpaper. The thickness of the side of the ski, the softness of the top edge, the angle of the side, and the softness of the top bevel edge are all parameters that can be adjusted for specific performance effects.
A very cool aspect of the superfil / sanding tuning technique is the ability to adjust just one side's turning characteristics without changing the other side. My 2 4 6 was working well but 1 3 5 was toxic (dumping me in). Sharpening just the leftÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â bevel cured the problem but left the 2 4 6 the way I liked it.
Perhaps the manufacturers could add a bit of fileable material (a la old LaPoint skis with their 'file on" edges). Competent tweakers - like those on this board - should have no problem tuning edges. It's another tool, and one without as many tradeoffs.