I honestly don't know what you saw that made you think he had any pocket jitters. That was one of the most impressive things to me was his pocket awareness, kept moving his feet, moved up in the pocket to buy time and kept his eyes downfield. The few times he took off for first downs it was last resort, but he shows an innate awareness of the pocket around him.
Only nit picky thing I see is he needs to continue to work on footwork, and not throwing from his back foot so much. Not surprisingly his worst throws came when he did that.
But I saw literally zero jitters. Just don't agree with that characterization.