The sequel to The Force Awakens doesn't really build on any of the threads that were started by its predecessor.
It also adds another big twist in the reveal that Luke and Leia are twins.
As Anakin, now Darth Vader, turns into a dangerous foe, Obi-Wan goes into exile alongside Yoda after securing the safety of Luke and Leia.
For one thing, it doesn't take as long to watch as the Ultimate Order, which requires an enormous time commitment that'll be rather too much for more casual viewers.