My last post just made me realise something
As trash as he was an actor the show received a shyt ton of hate for killing of Carl, he was the 2nd most important character to the story, and they killed him off just as a plot device for Negan to be spared..
Morgan was the first person Rick met in the apocalypse, they had the longest history, Morgan was the person who always tried to help Rick have mercy on others but he never listened, Morgan coulda died in the war after going crazy again, this could of made Rick vengeful, but have mercy on Negan at the last minute, this would of made a lot more sense than them having to kill Carl off.