Just from watching the last two games, I started to look at the players Miami got for Christian Yelich, Giancarlo Stanton, Marcel Ozuna, and JT Realmuto. Intending to look up how each player they got has worked out, I quit after searching for the players they got for Yelich. A miserable batch.
I believe they got Alcantara in the Ozone deal. Top flight pitcher. Sixto Sanchez for JT. Also top flight but injured. They also got Alfaro. The reason you have a GM and scouts is to identify the good ones.