On Leia there is the implication she was still watching Ben after she died. She dies when Kylo is stabbed yet doesn’t fade into the force until Ben later does. That is why Maz is smiling - she knows they are both at peace and died fulfilled. I liked the contrast to the TFA moment - “That saber, it belongs to me!” With Ben and Rey’s silent understanding of each other and Rey faking out Palpatine and sending the Skywalker saber to Ben. Rey looked genuinely happy to see him after he revived her. And watch Driver’s performance - he looks so awe-struck, then contented. Then accepting. I know it isn’t what you wanted but he dies truly happy. And Rey looks confused when he starts to slump, then sad when she realises. They could have done more though I agree. I would have liked Rey to really be a Skywalker sure. It was an interesting dramatic decision to have her a Palps descendant that rejects being Queen of the galaxy instead.