Not exactly net wins added, but FG just put out an article showing who increased their playoff odds the most:
https://www.fangraphs.com/blogs/zips...tional-league/
The Braves improved their odds by 3.1% at the expense of very little future value. I give AA's first deadline a solid B.
They could have likely increased their odds by another 1%-2% had they added a LHH 3B and acquired better BP pieces, and they probably could have done so without giving up many more future wins than they did. That would have gotten an A+ from me.
However, I wouldn't disagree with someone who said, "Touki and Gohara will likely improve the BP as much or more than any reasonable trade acquisition, so the Braves didn't need to spend any resources on the BP".