You're correct, he can't play in this league...at least not very good.
He's a VERY mediocre QB on a run-first team. Now that he doenst have Mangold in front of him, he will be exposed often. IF god-forbid, Greene ever go down, you wouldn't stand a snowball's chance in hell
Can he call you slappy then? Henne is exposed when he gets in the redzone, he cant close the deal.