NRS took the concept of skill/talent trees and implemented them into fighting game. This is brilliant. Like some of you have mentioned already, this new feature will be loved by character loyalists and even though one style will be stronger than the others, we should be hopeful that each style could help more than another in different match-ups, without needing to change your character to boot.
I am loving SZ in all his variations, I will probably learn all three. Ice Weapons is my favorite one for sure.