I got the following from Volkl:
I think you are talking about the Vertigo Motion, which was a Vertigo G3 with the Motion System integrated into it. Anyway, the Vertigo Motion was Wood Cell core w/ energy construction. I believe everything you said about it - a 184 is too long and it can definitely chatter on the super hard stuff. Keep in mind, though, that the Vertigo Motion was never intended to be superb on the hard snow. Skis like the F1 are built specifically to go fast on steep, icy conditions, so in some ways it's a little unfair to compare them to a Vertigo.
The other issue you need to think about is width - the wider the ski, the less grip it is going to have, and this has nothing to do with Power construction. It's just physics - a wider ski has more ability to flex torsionally. Torsional flex means one thing - loss of edge grip.
All that being said, you will be glad to know that the 724 Pro and the 724 Ax4 are full Sensor Wood Core skis. They're not Power construction, but they will be substantially better on the hard snow than the Vertigo Motion because they are stiffer and the additional wood will quiet more vibration.
If this is the main thing you are concerned about, don't be. I would also suggest than the Explosiv is not as good on hard snow as either the PRO or AX4, regardless of construction. As described above, it's just a function of width.
I'm glad you like the attribute of the Power construction, but the truth is that the newer constructions are indeed better for most skiers. Newer constructions allow the skis to maintain or even improve edge grip and stability without the need for skis that are too stiff. It's not really a cost thing - in fact, it's cheaper to make a Power construction ski - there are fewer machines required to cut and form the materials.
Power construction continues to be a viable method for the small segment of skis that need to be fairly stout - Race Stock skis. The Exlosiv is built exactly like them.
"Power" construction is best described as "old school"- Sensorwood Core, two full sheets of titanal, all wrapped in a fiberglass torsion box with ABS sidewalls.
The truth is that it is outdated for all but the strongest, highest performance skis made - full race stock models.
The Vertigo G3 and AX3 share the same wood cell core. The wood cell core is four independent wood pieces running lengthwise. There is a small column of PU foam between each piece of wood. The whole thing is wrapped in fiberglass.
The Vertigo G3 and AX3 are 99.9% the same. The only difference is that we put slightly more glass (but no less metal )in the AX3.
I can assume that the person who told you that there was reduced metal was confusing it with the 724 Pro - a new model that has no metal at all.