However, one important caveat applies: now that Disney is in charge of canon, none of this may apply. That said, it seems that Disney is generally trying to keep their canon in line with what Lucas wrote, so these statements may be seen as having some canon validity. Further, some of the top people associated with the new canon, such as J.J. Abrams, have suggested that they don’t want to question Lucas’s pronouncements:
I will just say this: I would never presume to question anything
George Lucas says is canon in Star Wars. And our job was not to negate
or undo. A lot of people who are critics of our Star Trek, and I
respect all of them, said we destroyed what they loved and negated
everything. And we worked hard to clarify that we are not saying that
our Star Trek over-rides a thing of the original Star Trek — it was a
parallel timeline. I never wanted to negate canon that fans held so
dear. And because I love Star Wars and have for too many years… … And
having said all that and meaning it — I don’t want to presume
over-write or change what George says the rules are.
Further, what is canon has showed Luke managed some pretty impressive feats, such as apparently deflecting an explosion using the Force (Shattered Empire):