I still think it was a waste with a force projection Luke fighting Kylo Ren. In the moment on first watching before we knew it was a fake force projection, it was like “What’s going on here?”. But I think a “real” Luke should have fought Kylo. As force projection Luke feels empty. I think on repeated viewings in the future, this fight scene will feel real empty and doesn’t give a fulfillment to the conflict between Luke and Kylo.

Imagine if in Return of the Jedi, that we find out at the end that a fake projection Luke or a fake projection Vader was really fighting the other? It would feel real empty.

Or say in A New Hope, that we end up finding out that Obi-Wan was sitting in a closet somewhere on the Death Star. And that he used a force projection to fake fight with Vader, and then Obi-Wan just disappeared. It wouldn’t have a fulfillment like what we got with a REAL Obi-Wan fighting a REAL Vader.