I think the opposite. As even if George had made the Sequels back in the 80’s they would be vastly different to what Disney gave us.
Take into account two major bits:
“If the first trilogy is social and political and talks about how society evolves, Star Wars is more about personal growth and self realization, and the third deals with moral and philosophical problems… The sequel is about Jedi knighthood, justice, confrontation, and passing on what you have learned.”
A quote from George in the 80’s. He always viewed each trilogy as being different from the last but interconnected.
If the above quote is from the “Icons: Intimate Portraits” book, then it is worth mentioning that George Lucas only refers to the possibility of there being Sequels as a vague notion in his mind.
In a 1997 issue of the “Star Wars Insider”, Lucas said “[The whole story has] six episodes…If I ever went beyond that, it would be something that was made up. I really don’t have any notion other than ‘Gee, it would be interesting to do Luke Skywalker later on.’ It wouldn’t be part of the main story, but a sequel to this thing.”
In a 1999 interview with “Vanity Fair”, Lucas denied ever having any plans to make nine “Star Wars” movies. “When you see it in six parts, you’ll understand”, Lucas said at the time. “It really ends at part six.”
There are more similar quotes from George. It really can be difficult to take George’s words as fact at times.
Maybe, at best Lucas’ quote of "I really don’t have any notion other than “Gee, it would be interesting to do Luke Skywalker later on.’ It wouldn’t be part of the main story, but a sequel to this thing.” has been incorrectly misconstrued as being his outline for his Sequel Trilogy? Because in Lucas’ own words they are not part of the main story, but may be an idea for a possible sequel or continuation of Luke’s own personal story.
Yes, he’s always said as much since the early days that he only had vague notions of where the Sequels would go. They weren’t ever as detailed or as mapped out. He kept the Prequels we ended up getting vague enough in the event he never made them but open enough that he’d have wiggle room to continue and conclude the story more definitively.
His Sequels explored Anakin’s origins, the mystery of Sifo-Dyas, Darth Maul, the power vacuum that is indirectly mentioned, and quite a bit more established in the first three.
He also said in 1997:
“Let’s just get past the first three before we worry about the last three.”
I think he went back and forth with things but still planted seeds in the event he ever felt the urge to continue and conclude the story. He seemed to distance himself further from the idea when he got backlash for the Prequels and I can’t say I blame him as no creative person can work in a situation where people are telling you what a horrible person you are. It’s very heartbreaking as he was following his vision. Star Wars was his. It may have created a whole in our collective culture but it’s his baby. He owes no one anything but in the end he came around as in 2011 he started researching and writing up his Sequels. He decided to not make the films himself and gave certain fans exactly what they wanted by selling the company.