I think a lot of what you’re saying is just arguing semantics. There is a very clear and glaring problem with two very conflicting perspectives. Either Leia belives Jedi training would help with dark tendencies, or she believes it would make things worse. What she says in TFA contradicts what Luke says about her here, plain & simple.
I’m talking about what is actually said and shown on screen, you have this whole other movie in your head where Leia has a whole character arc, but as you said, we got very little Carrie on the film. We don’t see Leia “continue her Jedi path”, we see Leia helping out Rey on HER Jedi path. We don’t see Leia struggle with inner darkness, we see her confidently pull her son back to the light. And we have TWO whole movies where Leia is very clearly NOT a Jedi in any way. It’s stupid for Rey to suddenly be calling her “master” now (add that to the stupid pile for this movie), but at least I can see it as a simple sign of respect towards a mentor that’s trying to help her down the right path, that does not make Leia an actual “Jedi Master”. She was always in tune with the Force and she once trained with Luke years ago, but she never practiced their religion. And it’s better to keep it that way for the sake of continuity with the rest of the trilogy, which I thought was the whole point of this fan edit.