The idea that Rey doesn’t need the dagger to find the Wayfinder could have wider implications in the story.

She destroys Ren’s ship on the island, including his Wayfinder. When Luke says ‘You have everything you need’, he could be referring to the force that will lead her toward evil, but that she must harness this force to lead our heroes to Exegol.

We could see her removing the Wayfinder from Ren’s ship, but alter it to show that it is clearly burned and nonfunctional. Perhaps remove her line about ‘two were made’ to make it ambiguous what she’s thinking in that moment. Then later when she is flying to Exegol, the shot of the Wayfinder on her dashboard could be altered to show that it isn’t glowing and isn’t hooked up to anything. Really, this needs only to be a visual change in two or three shots to indicate that Rey isn’t using the Wayfinder like Ren did in the beginning of the film, but that she’s relying on her dark nature to find Exegol, even if she doesn’t realize that she’s doing it.

Not only would this subvert the McGuffin-heavy plot, but it would bring everything back to the level of pure character and be a dark echo of A New Hope, with Rey using the Dark Side to fly Luke’s X-wing and save the day.

Also, it always felt like kind of a cheat that the Wayfinder wasn’t destroyed with Ren’s ship, which this fixes.