Filling out a roster and payroll management are his main issues. I'm fine with his drafting and can forgive the Dickey/Marlins trades since he seems to have learned for his mistakes. But the roster management will always be an issue with him, and obviously I don't like his choice of managers in case that wasn't clear in my previous posts.
He's not the worst GM, and if the off-season he just had is any indication, he might be trending upwards, but without a playoff appearance this season, he's done.