The thing about “It didn’t scare me enough then. It does now”…that wasn’t why Luke went to Ahch-To. That was him underestimating how deeply Ben would descend into the Dark Side. But he didn’t have an existential crisis because he was scared of some punk kid with daddy issues; he had an existential crisis because of what he almost did to the punk kid (with daddy issues). “It passed like a fleeting shadow. And I was left with shame… and with consequence. And the last thing I saw… were the eyes of a frightened boy whose master had failed him.”

Of course, we could just be overthinking this line in TROS. Rather than try to ret-con yet another thing from TLJ, or do a dialogue reconstruction (which I know you’re understandably iffy about, Hal), we could simply cut the scene like this:

Rey: I’m never leaving this place. I’m doing what you did.
Luke: I was wrong…what are you most afraid of?

He acknowledges his past mistake, and then immediately gets to work trying to help Rey. It might also be helpful to trim/overlap the space between their lines, as if Luke doesn’t want to hear her petty excuses, and wants her to start being honest with him about what she’s doing here.

“I’m never leaving this place. I’m doing what you di-”
“I was wrong. [beat] What are you most afraid of?”

As for the purple sunrise, trust me, I have no intention of taking over Nev’s incredible work. It’s just an idea I had, and I wanted to put together a quick example of how it might look. So just as a general question, do people like the idea of a purple-tinged sunrise? Or do we think the current yellowy version is better?