If there was a way to turn Luke’s exile into Kylo’s exile, that’d be more thematically fitting an ending.
Kylo dying was trite and cliche and also completely predictable given that it was Disney. But having him alive, alone, living forever with his crimes…that’s more interesting a fate.
You’d have to re-edit TLJ and ROS heavily, though. Massive undertaking, would require a lot of deepfake skill to change Hamill to Driver.