I don't think the Heat would go for that because say what you will about Walker but he's better than Kenny Thomas, and the difference between Bibby and Williams is pretty negligible at this point. And you're asking them to throw in a pick on top of that, which I don't think is going to happen.
And that really doesn't accomplish anything for the Kings, except obviously the pick, which I don't think the Heat are going to give up for this pakcage.