His stint in the Dodger's system lasted 74 PAs and topped out at AAA (where he had just 31 PAs). His stats are more the result of playing against a bunch of young guys and small sample size. When you watch this guy play for any length of time at all you quickly see that he has a slow bat and stone hands.
I can't see a way that the Braves got any kind of a good, realistic look at him and still wanted to trade for him. He's not a good player and that becomes clear very, very quickly.
It was a mistake by the front office but I'm not calling for them to be fired for it. They know they screwed up. It happens. Just have to learn from the mistake and not repeat it.