Good point about the old film quality. I don’t know - I haven’t seen any of the modern releases in years. Maybe it’s been restored enough to match at this point?
I don’t think the goal of the Wayfinders though was that only Sith Lords could use them. Kylo plugs an aux cord into his, and it shows a little Garmin map with directions where to go, no Force required. So, like, I don’t think Exegol is intended to be an entire planet that’s exclusive to Sith Bloodlines. I think we should keep it simple: Dagger shows Rey to go to Endor, not because she’s a Chosen One, just because she’s willing to embrace the Dark Side.
EDIT: How about: “The path to Exegol will be revealed to those who embrace the Darkness”? Sounds kind of vague and cryptic.