I can kinda see your angle there. Most of the problems are in TLJ, personally - best exemplified in Snoke’s line from TLJ: “Darkness rises and light to meet it”. In the Biblical worldview, darkness/hell is simply being separated from the absence of God’s light. This is similar to how in Star Wars the dark side is a corruption of the Force, and it being balanced is there being absolutely absolutely no dark side (contrary to popular belief). These aren’t supposed to be opposite forces that are kept equal to each other in power. The dark side is a cancer.
And you can’t say it’s just that Snoke has a misunderstanding of the Force, because Luke says the same thing to Rey: “powerful light, powerful dark”. I think the only way you can retcon this line is that Luke is referring to the potential a powerful person can have to either do good or bad things. The real world answer is that DOTF was originally going to make the dark side an amoral thing, and you should tap into both sides of the Force (yuck!). I don’t understand the people that enjoy that leaked script at all.
Character regression is an entirely different discussion. I do think it’s possible to slip back into old patterns and habits in life, so there is some interesting narrative potential even within the context of a Christian framework. You are supposed to remain constantly vigilant or else the dark side (devil) can devour you like a lion. There’s a solid story there to be told there, and it reminds me of Voldemort’s return in the Harry Potter series with the ministry denying his return and not doing anything about it (New Republic vibes). I just don’t find the way they did it with Luke all that believable. He nearly killed his father because he’d threatened his sister; we are never shown exactly what Ben would do according to his dream. And there wasn’t much payoff for Han or Leia’s regressions besides redeeming their son in TROS.
For the new main characters, I think they did actually end up adhering to what the Force wanted them to be. It’s why I like Kylo’s character so much. He reveres his grandfather to an unhealthy degree, and keeps pursuing the dark side because he thinks that is who he truly is and will satisfy him. But this just makes him more and more miserable. It’s only when he becomes Ben Solo again that he feels peace and love. As for Rey, yes, I can see why you might think that her taking on the Skywalker name is a denial of the truth the Force created her as, but I simply see that as an example of the good that can be made out of bad. George refers to Palpatine as the devil himself, so it’s hilariously ironic how his machinations end up being as own undoing. Adoption into a new family and being given a new name are also solidly Biblical concepts.
I genuinely believe there are plenty of concepts within the sequels that can align with these ideals, just not within the idea that the end of ROTJ is supposed to be the second coming.