New system, yes.
Attempt at correcting his throwing motion. Still looked very elongated.
Attempt at correcting his footwork. 3 step drop backs still looked like 1 and a half, the ball still did not come out on time.
Drop backs are timed with the break of the receiver so the ball can be released on time.
If you can't get your footwork done on time and also have an elongated throwing motion the timing is way off.
Maybe he only drops back 1 and half steps to make up time for is elongated throwing motion. However the ball still does not come out on time because can't read a defense, anticipate and throw a receiver open. He wants to wait until the WR is open before he decides to throw the ball.