i watched the whole game, unfortunately.
Two thoughts.
One. Sanchez is an NFL QB; he's not a "very good" or even "pretty good" NFL QB, but, after being forced to watch him for three years here in NYC, it's pretty clear to me that he meets the minimum standard of being able to run an offense on Sunday afternoon (of course, you shouldn't trade up for and build your team around a player like Sanchez, but that's another topic). IMO, after the Jets jettison him two or three years from now, he will have a long career, barring injury, as a journeyman starter for franchises that have histories of not building strong teams and whose fan-bases are either weak or don't expect much anyway. If his ego could accept it, he would also be a fine backup for an elite QB, from which position he might be able to learn enough to become "pretty good" someday; but, he will never accept that.
So, when playing against an acceptable to average defense, Sanchez will always complete his share of passes when the routes are conventional and the receiver has no trouble getting separation. His only pass that I thought was noteworthy was one he completed into the end zone. It was perfectly placed and the Buffalo defender could do nothing about it.
Two. As others have observed, they gave up 28 points to what is effectively an NCAA offense, complete with a QB from Hahvahd..
In other words, it's a long season. Reality should set in this weekend in Pittsburgh.