From MLBTR:
"While it’s not yet clear what transgressions the Braves have committed, the resignation of a general manager — be it forced or voluntary — would represent the most extreme outcome for any scrutiny under which GMs have come in recent years. Padres general manager A.J. Preller was suspended for one month after his team’s medical disclosure practices were revealed to be substandard, and the Red Sox were forced to tear up some agreements with international prospects they’d signed in package deals as a means of circumventing international bonus restrictions. Neither of those incidents, however, resulted in the resignation or firing of a high-ranking official."
So why did Coppy need to go? Why didn't the Braves rally around him?
Who is still so blinded by ignorance that they can't see this was due to the rift in the FO between the statheads and scoutheads, with the scoutheads winning?
Coppy took the fall for the Braves not meeting revenue goals in 2017. It is the last card upper management has to play before they are fired themselves. Simple as that.