I think you all forget that this game is still in early development and the trailer just shows us some animated pictures, so calm down. Maybe this game will come out in 1 or 2 years(I don't hope so but possible) and many things could change, so calm down.
@Price, You said you don't want to have the feeling that this is going to be a NW 2.0 but honestly, I personally don't see many other ways to fight during the NW beside the current MB:NW fighting system, if the Dev find an alternative that would be, at least, interesting to play so pls everyone, don't get hysterical

(sry for eventual mistakes, have the felling my english sucks atm)