Since he was an unaccomplished nobody, who was a sickly 10 year old when his father died, how can you claim he had a lot of undiscovered potential? Any potential he had is in your own imagination. It's more likely that if Napoleon's regime survived till his death in 1821, some military, or political strongman would've taken power for himself. Napoleon's regime was constantly threatened with coups, and a 10 year old boy, and his Austrian mother would hardly be a strong center of power to hold together what was essential a military dictatorship.If Hitler had died during the Beer Hall Putsch, he would be considert a nobody. If George Washington had died during the French and Indian War, he would be considert a nobody. If Napoléon Bonaparte had died before the revolution, he would be considert a nobody. If Abraham Lincoln or Mahatma Gandhi or William of Orange or Nelson Mandela had died young, they would be called nobodies. Napoleon II has a lot of undiscovered potential and therefore is a interesting character for alternate history. And speculating is an essensial part of alternate history.
Napoleon's position was based on the strength of his military prestige, personal popularity, and the loyalty of a police State. The Government, and army were staffed by ambitious men, of tenuis loyalty, with many resenting the Bonaparte family, and the public was volatile. The history of the period 1815-48 showed just how unstable the political situation in France was. It wasn't the Middle Ages anymore, and France wasn't a stable Constitutional Monarchy, it wasn't a time for a long regency. The French expected a strong national leader, to defend the State against foreign enemies, and domestic unrest.