Wenger: "Theo got some good treatment, but he responded with good commitment and desire. He has become a different player."
Certainly is a different player. He really does take responsibility. You get the feeling he now understands where his strengths are. He doesn't mind - as he did in the first half - shamelessly knocking the ball towards the corner flag and taking a defender with a 10 yard advantage over 50 yards. He's more aggressive in the sense that he no longer seems apologetic about his pace.
How to get to the next level (the top level, it has to be said): getting extra awareness and improve his decision-making. Technical side is not a problem for him. Going for a shot when he should pass, or not seeing the third runner and dribbling out towards the corner flag are his (small) problems that he has to work on.