Does anybody else want to see Luke pull a reverse of the ESB Bespin Duel on a Knight of Ren? Just utterly dominate a fight, not just physically, but mentally and spiritually as well?
I mean, the ROTJ Duel was pretty close to that for a while, when Luke was still calm and in control, trying to argue his father down, and while it kind of worked, his methods left him vulnerable to Vader igniting the dark side in him with a few taunts. I'd love to see him finish a duel with words in the same cool, collected tone, and leave a dark siders believe in its strength haunted by doubts at minimum, and possibly driven back to the light at maximum. Give him a badguy dealing with a struggle between his conscience and his beliefs, and have Luke shatter the beliefs...
...Or maybe have it be Rey he talks back to the light. Have her struggle with aggression, come close to murdering a Knight of Ren, and then have Luke disarm her and finally embrace his ROTJ beliefs that you can defeat the darkness. Maybe even make it the moment where he resolidifies himself as a Jedi Master, and not just as a Knight.