It’s a real problem, that they recycled the plot (not necessarily whole story, but certainly plot) of the OT for the ST characters and world. Something should happen next that couldn’t have happened as a direct extension of ROTJ’s ending, and what that is isn’t intuitive or natural. Luke’s arc has been recontextualized to involve “hubris” and “failure,” so that would need to be part of Rey’s trajectory even if she ostensibly going on to “finish what [Luke] started.”

But what is that? Does she bring something feminine that Luke was lacking? Does she foster a collaborative, nondogmatic effort to train up a new generation of Jedi with great humility?

Or does an evil remnant hidden in space re-emerge with a superweapon and pose an urgent threat over the course of two hours?