Oh yeah, don’t get me wrong, I think it is good to keep in mind what George would say: Star Wars is for 12-year-olds. Not everything has to be logical or practical, as long as it is fun and imaginative.
But, if a change can be character driven, then it might be more valuable than a fun story device.
I do like the idea of the marker though. So, was the marker and the blade made for anyone who was worthy to be able to find Exegol, or a specific person? If someone made the marker and the blade knowing where the wayfinder was, then they must’ve wanted to leave it there for someone to find.