pell survives because it ruins the entire theme and message of alabasta if he dies. theres multiple major scenes about this including the one in my av where luffy tells crocodile to his face "she doesnt want a single person to get killed in this rebellion". crocodile telling them "just throw away one or two friends and you can be out of this." the entire "people die" conversation where luffy punches vivi in the face literally ends with luffy making her promise to accept their help so they actually can save everyone. the conflict was never about luffy telling vivi that she has to accept her friends dying, it was about him telling vivi to accept that her friends wanted to share the risk, because vivi wanted to try and stop the war herself and he knew that would fail.
the idea that pell dying was a last minute change, or that he was supposed to die, or that pell dying would make the story better is so fucking stupid and i cant believe its so popular. it makes no sense and the only reason you'd think its a good idea is if you just didn't pay attention to the story and only read one piece for the fights. except they even talk about it during the fights so theres no excuse lol. pell is the fucking guardian deity of alabasta. if he dies the country starts to fall apart and its not a triumph its a compromise. crocodile's ideology wins because they just threw away a friend.