Some of the New York writers like Joel Sherman think the Yankees have some serious potential weaknesses, especially the infield. Teixeira's health is still a question mark. So is Jeter's, I would think. If Teixeira and Jeter are not at least decent this year, the infield could be awful.
Potential huge upsides for the Yanks are Sabathia, Tanaka and possibly even Pineda from the sounds of it. If those guys come out hot, maybe Hal will be persuaded to spend even more money if he has to.