I almost posted an old article that I found, maybe I'll decide to post it soon. But it talked about how learning a new offense is a really long process for a quarterback. Not just the verbiage but the philosophy of your coordinator and the checks and hot reads and the timing (Oh with my last coordinator this was a three-step drop but with this coordinator it's a five-step drop) so on and so forth. So yes I'm very much an agreement with you that Stafford just needs to get comfortable. I think that similar to Brady last year we will see him at his best around November and December.
But he has had two injuries to his throwing hand. So why don't put the majority of his streakiness on that I do think that there's reason to believe that it could be playing some part