It's funny b/c when Sanchez first came in, and Lane Johnson said this as well, they moved faster. He clearly is more comfortable with tempo. And they moved the ball pretty well too. But just like with Bradford, drops, penalties and Miles Austin ruined things.
If Sanchez had just been more patient, Cooper gets set and the Ertz TD is good. If he just throws the ball away, they kick a FG and probably win. Instead, he has ~35 snaps for 3 points. It's like if he could just remove those really bad negative plays, he'd be perfect for that offense. He's smart, aggressive, a good amount of mobility and a good enough arm. But they win if Bradford finishes that game and lose b/c Sanchez just can't get out of his own way