You don’t partially solve a problem with a movie (which is not really a problem since the rehash thing is part of some kind of trap) by damaging another one. And I don’t even see how implying that DS2 is a rebuilt DS1 would even change anything for ROTJ except making the first real Rebel victory a fake victory after all. Luke got a medal for that ! (“oh by the way Luke, DS wasn’t really destroyed and is being rebuilt… soooo… I’d like to get the medal back, and don’t tell me you can’t because you gave it to Chewie”).