His passing ability is very good. He's intelligent and reads the game well (though he does sometimes acts very foolishly).
On the other hand his ability on the ball, close control, etc. is never going to be good enough. He may find better ways to deal with pressure, but he's never going to be a Santi replacement. And we sure need one - we need a top player in midfield. I don't think Xhaka is going to be one.
But I agree the verdict is too early.