Oh but I wasn’t answering to you with my post! Infact, You posted your text while I was writing mine.
I still don’t understand what reason would be strong enough to completely rewrite of half the saga to keep one moment safe.
I think the PT does need to be completely rewritten… because they suck.
Personally, I don’t think we need to keep any secrets hidden for reveals in the OT.
I asked the original question because some people (even someone major in my Star Wars movie watching life, Adywan) want to have the viewing order 1-6 but still keep the Vader/father reveal for ESB; but it’s ruined in ANH, and I don’t see a way around it. I would like the PT re-written, but not trying to keep any secrets hidden.
I think it would make a worse story if you’re trying to fulfill both goals at the same time. Just make the prequels a good story that you watch after the OT, and you’re golden.