Beckett is gonna be fine. His numbers are so misleading. He was pretty good for most of the year but his ERA was 5.01 because in his outings when he was bad, he was REALLY bad.
Another year of maturity should keep him from going fastball, fastball, fastball all the time and he's had a chance to figure out AL hitters a bit. I'm predicting an ERA in the range of 3.80-3.90