There are several issues with the old Expanded Universe that I was hopeful would be addressed in the new Star Wars canon, and chief among them is how much the general public knew about Darth Vader and his connection to the Skywalkers.
When the EU started in earnest in the early ’90s, Vader’s identity as Anakin Skywalker and his relation to Luke Skywalker and Leia Organa was still a secret: It’s actually a huge plot point throughout Timothy Zahn’s Thrawn trilogy. But as the EU, um, expanded, it became less and less so, until it was just public knowledge not only that Darth Vader was Anakin Skywalker, but that both Luke and Leia were his kids. It doesn’t seem like it was ever planned or addressed: It just happened, and the full implications were almost never addressed. Such were the early days of continuity. But with the old EU now set aside as Legends, how much does the galaxy actually know?
We might already have an answer.