Idk about you but being able to hologram yourself across the galaxy is pretty badass in itself and Im pretty sure unprecedented as far as force ability goes. Also want to add that Luke didn't die, he just became a force ghost, so it is totally possible that he will continue to be a part of star wars especially seeing the terrible backlash from VIII

Luke isn't dead, he just became a force ghost, just like Qui-Gon, Obi wan, Yoda, and Anikan. A big part of him doing that is not feeding into hate and aggression. Ex. Obi Wan letting Vader just strike him down in ANH.

I figure a big part of this choice being the possibility that Mark Hamill may not be alive come EP IX, but it still leaves the possibility for his reappearance in the later movies viable.