Daniel Murphy is an average to slightly above average but still incredibly flawed baseball player. He's a decent hitter with an above average contact tool, but zero plate discipline, as evidenced by the fact that he's only walked in six percent of his career plate appearances. He's a butcher at second base and is prone to blunders on the base paths.
Do I wish the Mets could have kept him? Yes, because I think he is a net positive, but I also think that Walker and Dilson Herrera will make it a wash.