I don't think Stanton plays scared at all---that kid is tough. He's battling through inexperience and playing versus some very tough defenses---most recently the Rams, the Lions and the Seahawks (possibly the three most disruptive d-lines in the NFL). It takes time and experience for the game to slow down for a QB. Right now Stanton is learning and doing his best.
You are correct, I was hard on him, I really meant that he still seems to be 'thinking' a lot during the game, his movement in the pocket isn't natural, seems like he is consciously working on it; when the routes are covered, he gets a little tentative. All likely related to being a backup and not having a lot of NFL gametime the last few years.