That was always an issue with sequels, TROS and ROTJ just leave less reason to continue than ROTS which ends basically on a cliffhanger. If there’s no groundwork that’s almost better because the ST was bad, so we can start semi-fresh. I think there’s still something worthwhile about fulfilling Rey’s character and enriching that era, in some ways it’s not as shackled as the ST was, the OT trio are dead, their only offspring is dead, no Palpatine or Snoke or Hux…

it’s not quite starting from scratch but I personally feel there’s enough to salvage with a good story and I find that worthwhile if it can rehabilitate post ROTJ/TROS era Star Wars, in the best case scenario the worst of the ST is an awkward blip on the radar for Rey which doesn’t necessarily tarnish her ability to rise to becoming a more realized character, I don’t think Vader is held back by his awkward phase all these years later.