Also, I have another idea for the hangar scene:

I feel the dialogue flows a lot better if we move around Kylo’s spiel about the light/darkness to after he reveals that they’re a dyad, in that way what he’s saying is more explicitly an explanation of what the dyad is, he says they’re two sides of the same Force coin before then saying if they joined forces they’d become unstoppable. So the reveal is basically “Palpatine sent me to kill you because he knows you will overtake him, but what he doesn’t know is I’m actually here to help you do it”.

I like how this new dialogue kinda implies they’d achieve some sort of balance if they were together (“powerful light, powerful darkness”) or that the dyad is trying to balance itself. To carry on with that idea I feel it’d be good to change Kylo’s line in the DSII “The dark side is in our nature” to “The dark side is in your nature”, since Rey is the one being pulled to the dark. Maybe this would lessen Ben’s ‘redemption’, as he admits of being pulled to the light, but I think it could be seen as Kylo trying to find a middle ground but being torn because Rey refuses to accept her darkness. Kylo is offering this more grey alternative to Rey, but since she refuses, she continues down her dark path and pushes Ben to the light.