This has nothing to do with Adys fantastic improvements.......Yoda now has life.... how he now forms the words....eg: the lip tightens as he says "why you fail".......the only other thing I did notice was when Artoo hobbles round to look at the X-Wing right at the beginning of the clip his head rises and falls.....now every time I look at that part, even if I focus on another part of the scene I still see it out of the corner of my eye.....the other thing about Artoo in the whole movie is how his language is exactly the same as in ANH just chopped up and rearranged , it is only in ROJ does he get new compositions by BB. I know it would be sacrilege to swap in some newer arrangements from the other SW movies....but in ESB I keep flashing back to where Artoo says the same expression in ANH.