Leia being Luke’s brother at all, snip.
I mostly agree, except for this being the motive for Luke breaking and attacking Vader to the point of almost losing himself. If there was a way to change Vaders dialogue in that scene then it would all work. Something else that Vader could say or use against Luke to provoke him. Maybe a threat towards his friends, lamenting their soon to be demise, or capture and torture then death. Something. Any good Vader impersonators on here?