I've yet to see any good gameplay, but from the little I've seen i'm mostly fine with it?
He's never had a ton of identity. "Other ninja" in mk4, which already had major issues with identity, and then "diet shao" later on didn't leave him with a ton of interesting options to go for.
I haven't seen the flip kick or the teleport, but that doesn't mean they don't exist. Even if they don't, I think i'm find with him being a MMAish grappler. It's hard to get too much of a vibe though from the crappy footage i've seen, and I wouldn't be shocked if he's got more going on. Frankly from the little I've seen he feels FAAAAR too fair right now, so i suspect there's either move properties I don't understand or other moves that weren't shown off.