So I got a chance to play the PS3 demo, and I can tell you right off the bat they upped the difficulty in this game by a few notches compared to NG3.
Enemies are more aggressive and tend to grab you more.
I like the fact they added moves/techniques you can unlock and also the addition of other ninpo abilites.
One thing that is frustrating me beyond measure is the INPUT LAG when playing Ryu. Man, it is to the point that is game breaking. When you got several guys surrounding you and you want to slide past and slice one guy, there is delay in performing that sequence which results in the AI getting a cheap hit.
However, when I played with Ayane it played as smooth as butter, I didn't experience the input lag in registering combos as I did with Ryu.
Did anyone experience lag in registering moves with Ryu when playing the PS3 Demo?
I am going to try the Xbox 360 version and see if it has the same problem.