The only thing that worries me about the noise is being able to audible out of a play. The Saints can show a look at first then change it, which would be hard to counter if you are in such a noisy environment. It makes me worry more than anything else the saints can do themselves to us.
I am not sure if they could use hand signals to combat this. Does the O-line have issues with changing protections if they do use a hand signal to change up the play? that would be for the x-o guys to let us know.