At least he seems to have a competent OL. I'd say that is the biggest deal breaker for rookies. If Sanchez had the kind of time Geno gets, who knows.
I'm not sure what you find so impressive about our o-line this year. Our quarterback has been sacked 30 times (3rd most in the NFL) and PFF ranks us as the worst run-blocking line in the league. Aside from Austin Howard, everybody is having a bad year, even Brick and Mangold. I trust Winters will improve, Mangold and Brick will return to form, and the line will gel as a unit in the future, but thus far, that hasn't happened.
Wayne Hunter excluded, Mark Sanchez did a lot to make talented linemen look bad. He'd be getting crushed behind this year's line.