I don’t know, it’s impressive work, but I just don’t feel it belongs in this movie. It feels too much like a teaser or in-film marketing for the next movie, which is something I associate with Marvel and not Star Wars.
I agree with your point, but I think one of TLJ’s main issues is that the ending doesn’t really build up to anything in IX in a satisfying way. Hopefully by adding some hint of what is to come it will help make the trilogy feel more well-thought-out