Alfonso Soriano has a ten million dollar contract with, I think, one year left. Flaws and all, he would be a great hitter in a park like GAB. The Nats may have to get rid of him because he refuses to play outfield.
Reds don't have a regular second baseman. While pitching is their biggest need, Soriano's offense couldn't hurt. I know he isn't great defensively, but neither is Freel, Womack or Aurilia at this stage of his career.
Milton would likely do better in a ballpark other than GAB. Reds might have to throw in a sweetner, perhaps an outfielder who can play where Soriano won't. Maybe Denorfia.
Reds fill Milton's rotation spot with a younger pitcher.
Nats get a pitcher who may rebound in their stadium and get rid of Soriano problem.