Honestly, I wouldn't have done it. I've not seen TROS, but the Sequel trilogy always had the problem of ROTJ ending perfectly for all those character. Any subsequent stories would completely overshadow any new character as why the fuck d I care about Rey or whoever when all I really want to know is where my boy Luke is at or what Leia has been up to. I think if it HAD to be done, I'd just take whatever George thought of and just follow his vision with refinements. He created those characters, Luke has a lot of George in him, so where he would like to take those characters is what I'd try to implement into a film trilogy.
However, as far as actual sequels, not a sequel trilogy following our OT character a couple decades after ROTJ, I'd do something completely different and new. I'd set it 100 if not 1,000 years after ROTJ with a whole new cast of characters and worlds devoid of Skywalkers and Palpatine, Empire v. Rebels. A whole new cast, a whole new conflict. That's what the series needs and I hope that is what Rian is cooking up.