I work here at Flux... hopefully I can answer your questions.
We did take off the numbers to all models for 13-14. Before, the numbers symbolized the amount of fiberglass in the baseplate... this year, we are using varying amounts of fiberglass in the baseplate, depending on your size. (A large would have more than a medium, a medium would have more than a small) The more fiberglass used, the stiffer and more responsive the baseplate becomes. Generally, if you have a larger foot, you are going to want a stiffer setup than someone with a small.
Canting..... We introduced something we call the Ultima Freeride Footbed, and the Ultima Freestyle footbed. On the Ultima Freeride Footbed, we have more dense sections on the toes and on the outside of the foodbed. On the Ultima Freestyle Footbed, we have put the dense sections only on the outside of the footbed. When I tested these... I kind of looked at it almost like a gas pedal.
The denser sections are going to give you good response where you push down on it. The footbeds have a softer instep, allowing yoru boot to compress into it as needed for your stance. The small amount of tilt from this new footbed adds more power to the nose and tail.
Hope this makes sense... let me know if you have any other questions!