FWIW there's an interesting piece in the NY Post today suggesting that trading Stanton to the Yanks was not what he wanted to do.
https://nypost.com/2017/12/10/its-killing-derek-jeter-that-he-might-be-helping-the-yankees/
The Dodgers reportedly wanted the Marlins to take either A-Gon or Kazmir plus eat 30 million of Stanton's contract.
One reason the Dodgers reportedly weren't as keen as the Yanks was the prospect of Stanton being a DH type in the last few years of his contract.
Sometimes the DH rule difference can be a significant factor in player transactions - maybe that's a good reason they should unify the league rules one way or the other.
A hitter like Stanton will help the Yanks win some low scoring games, too, you do realize that? He's a 6-8 WAR player if he stays healthy. A 6-8 WAR player does make a pretty big difference in the W-L record.