Nah his entire character arc started from him questioning whether his existence is right, which ended with him being proven wrong by Luffy, Whitebeard and his other Nakama risking their lives to save him. Him crying while on the execution platform looking at the War and how far his "family" goes to fight for his life, realizing that they value his existence is his character coming full circle in retrospect.
Ace & Marineford was Oda near his best in terms of character writing & story telling. Sabo on the other hand was interesting in the ASL flashback with his own dilemna & character arc, but he ended up in Dressrosa as a cheap copy of what Ace was in Alabasta. His entire dilemna about the state of the world & his noble family's expectations were wrapped up in one flashback and him not learning about the 2nd Division Commander of the Whitebeard Pirates and realizing that it was his own brother much earlier was pure PIS. His existence now, essentially invalidates Ace's death & Luffy's sad screams about how he only has one brother left in Marineford.
Personally, I think the manga would be better off if Sabo just stayed dead from the ASL flashback... but here we are.