Here's an analysis on why the Luke rewrite made no sense. PS. There are signs Abrams wrote it differently at first and Rian ruined it. It's questionable if Luke would be that prominent in the second movie at all. Sure, Abrams mainly soft-rebooted, he wasn't revolutionary but it might be better than making no sense. There is no point having a "good side" if they are unwilling to forgive their friends that faltered. What is the point of fighting then? What is the point if both sides are practically evil or neutral? What is the point of calling yourself the light side if you show no forgiveness or mercy? To sell pew pew and lightsaber fights as a fan service?