Watching Sanchez this preseason, he looks to have regressed since last year's playoffs. He looks out of sync and confused.
What I see is that he is not a good fit for Brian Schottenheimer's offensive scheme. The Jets currently run a scheme a system that looks to attack down the field and is predicated off of stretching the field vertically. Sanchez looks to me like a West Coast QB and would do better in a short timing pass kind of system.
I don't think that he will really have a lot of success until he is in a system that is a better fit for him.