I would tend to think that you offering Burnett in place of Phillips would make the deal LESS likely to be approved by him. Yeah he's giving up Lincecum and a solid stat-stuffer in Markakis. But if you offer him Phillips and Quentin, he's gaining huge quality in every offensive category. If you offer him Burnett, it makes the deal much more "even" in the sense that he's getting some extra power but giving up steals and pitching stats. If you can afford to offer him Phillips and Q, it's probably a better shot to get the deal done than with Burnett and Q.