It is a regular sidewall ski.......with skatedeck tip and tail. It's hard to explain without seeing them......most sidewall skis have tips/tails that are not part of the core (like last years armadas for example).....in the step-up it works the same way (and yes I think a few layers run the length of the ski). The reason Line did this (as it was explained to me) was because the skatedeck tip/tails help up better and didn't de-lam as easily, but skatedeck doesn't do as well in a stiffer ski (the extra carbon ollie bands are literally pulling the layers of wood apart that sandwich it in the ski); so they are taking the best of both worlds and giving it a shot.
And very true about next years base! Way nicer than this years.
Overall the ski is greatly improved.