Williams is not a guy I'd be anxious to trade, but for the right young pitcher, with years of team control, yes I would trade him. I value him below both Altherr and Odubel. We've got more OFs on the way and although we also have pitching on the way, I am pessimistic about building a good enough staff internally.
As I said earlier, we have an abundance of $ and salary cap space, which is why I want to target Darvish and Lynn (yes, better if no QO, but still better to lose the draft pick than to lose serious prospects). If the Phillies follow the "Phillies pattern", they will trade for a good pitcher, rather than splurging in the FA market. If they do that, and again not my choice, Williams is among the guys I would consider trading. If you can get the guy you want (which I think would be a bad contract guy, not Cole or Bumgartner) for a combination of guys from among guys like Galvis, Hernandez, Rupp, Joseph, Quinn, Morgan, Thompson I'd do it of course, but that's pie in the sky, you just won't get Bumgartner or Cole for that.