I understand the frustration, but there is more at stake then a couple of drives. The Bills need to spread the workload. No matter how good Cookie is, the more pounding he takes early in the year the more likely he'll be slowed by injuries later in the year when we need him most.
We need to get Davis and Johnson more involved. If they can't do the job, then we need to give Gore a look. Cook and Josh can't carry all the load. It's really that simple.
Against a mediocre team like NO, that is a perfect opportunity to try to get Davis and Johnson more involved. I do agree with you that the play calling in those 3 drives was suspect, but that doesn't change the objective, or the overall quality of work done by Brady as our OC.