Star Wars already had a Sixth Sense moment with Kotor and Revan, I doubt it will ever happen again.
Vader being Luke’s father was lazy, like Leia the sister. Yes Vader being Luke’s father may be novel, but it changed the entire trajectory of the series and not for the better. To being all about Darth Vader. The 6 film Saga of the tragedy of Anakin Skywalker, Lucas didn’t even have any idea for he had barely one movie.