Saul’s fake death is the worst of them all. It had enormous meaning in the story. The guy fails on Robin’s island while trying to desert the Marines because he feels incapable of carrying out a Buster Call, and ironically ends up on the very island where the Buster Call is going to take place. As if, despite trying to flee, the Buster Call were a curse that follows you wherever you go, or as if he were destined to die no matter what, while helping Robin survive in one final gesture.
His death, and the subsequent hunt for Robin, made the taboo surrounding the Void Century and Robin’s life as a child in hiding believable. Seeing him alive again is therefore a massive waste and harms the original story. On top of that, doing something as major as bringing a character back to life just to replay a similar scene as a reference, make the characters hug and cry, is ridiculous, and bordering on morally obscene