Obviously, as with Aaron, and even more so with Brett, the O-Line needs to buy sometime. Rodgers was perfectly fine throwing off balance, however Hundley is not (well at least not yet). Brett is obviously going to feel pressure in real NFL games from defensive penetration.
He has the ability to scramble, which is fine. He has the legs to do it and his runs today proved it. Yet, when he decides to scramble and stay within the pocket/behind the O-line he looked a little indecisive and let himself get off balance. I don't know how much the footing today played a role in that, not to make excuses, but clearly Brees wasn't at his best either.
He has the arm strength to throw downfield, but no accuracy when he's throwing off balance. Jordy saved him in the first half when he tried to throw off the back foot. I guess that doesn't happen right out of the gate, but if this team has a shot at winning, he needs to improve upon that.