You'd know if you got the bad ending because Nal doesn't get saved, also the game presents you with a choice before hand when you go to fight Jewel. You have to let Nal get raped a lot, and then go around to each of the decks and find the corruption interactables; two of which are in the Observation deck, one is in the Manufactory, one is in the Crew deck, and one is in the Research deck.
And thanks! We'll see about more content, it really depends on how much support the game gets.