Opinions differ as to how important lineup orders are, beyond getting your best hitters more plate appearances over the course of a season by hitting them generally higher in the order. But at least most fans can agree that it’s fun to talk about, so there’s that.
Lineups evolve a bit over time, especially with a younger team, because you tend not to want to thrust less experienced players into higher profile slots. Just as closers often start their careers in middle relief and pitch their way into set up duty and then closing, good young hitters often hit 8th as a prelude to moving up to 6th and then higher.