Hmm, I'll try for a minimal changes. My major pet peeve is the rushed ending, my main goal is to set up the Ashi Time Portal thing and give the ending more space to breathe.
E4: This is fine. Maybe make Ashi less petulant and more looking for a hidden motive ("You just want an ally!"), ending with the realization that Jack's just selflessly saving her life.
E5-6: Swap E5-6. Change the montage episode to saving one or two of the groups from Aku's goons, with scenarios obviously going against the propoganda Ashi's heard
>I don't understand, why hasn't Aku's righteous brigade driven off these bandits?
>That -was- Aku's righteous brigade
And maybe she rationalizes it ("They did something wrong!") but completely turns after the childnapper encounter and realizing Aku was totally cool with it. Also don't have Jack wander off.
E7: Doesn't need to be changed, though you could resolve the Jack seppuku thing into his sword vision quest.
E8: I don't mind this episode, though try and trim some runtime and move the Scaramouche reporting scene here.
Have Ashi obtain and develop some fledgling Aku powers throughout this. Like she's just powerful enough influence Aku's existing creations/magic, but she couldn't open a time portal by herself when she tried.