That was an interesting episode but full of Bryan Fullerisms. The thing about it though is that while most of the crew has an identity crisis and are filled with doubts, copy-Janeway is the only one who doesn't. She stubbornly to a fault, insists on continuing their mission of getting everyone home to Earth. She doesn't care that she's a copy, she just cares about getting her people home. And when the rest of the crew convince her that Earth is probably unattainable and that it isn't even really their real home, she doesn't give in to despair or sheds her identity, she merely shifts the goals a little. From getting home to Earth, to getting home to the Demon planet.The VOY episode Course: Oblivion kinda hits on the same themes you were talking about, Arugula, though it's much bleaker than anything that would probably show up on Prodigy.