JP looked lost, not the O-line. And it WAS a matter of the players not being good enough to execute the schemes. When you have a bum like Williams, Teague who's getting blown-up in the middle, and a crappy LG, things are a little tough.
I think that McNally's rep precedes him. With the Giants and Bills, he was given crap and expected to make something out of it. At the very least, you need SOMETHING to work with because as has been said, he's not a miracle worker. That being said, he's got what looks like something to work with, so the excuses end this year.