I think he generally made the right read, but was often just a split second late. That should improve with more practice. How many times did he sail the ball just a little high, or with just too much zip on it? He easily could have had another 50 yards and a couple TDs. Imagine if the Edelman pass didn't get called back? Could have been a very solid game. He didn't throw an interception through 2.5 games. The fumbles are a bit worrisome, but I imagine that he'll improve with time.
In short, nothing that can't be fixed. I like his game, and I hope we can see him again next year in the preseason (hoping Brady stays healthy all year).