George Lucas was always a special effects guru. His writing, dialogue, and scripts were always lacking. As a director, his eye was on the visual effects more than directing the acting. A lot of actors have voiced the frustrations of working on star wars.
Prequels had a decent story, but again Lucas was big into the newest possibilities of CGI for the special effects. Despite having great actors, the dialogue and acting fell flat. The acting simply wasn't Lucas' main concern or forte.
Of all the head scratchers is why Lucas deviated away from the novels.
I guess as a filmmaker and story writer, he didn't want to be bound by other story tellers? He wanted to write his own story?? Hate to say it, but the Timothy Zahns of the world wrote a much better story than what lucas came up with going into movie 7.
Maybe Disney will work Admiral Thrawn and other Timothy Zahn content into the movie canon somehow (with different actors of course).
I haven't watched Kenobi yet. I DO look forward to it. Disney has the potential to create good stories and better acting than what Lucas ever pushed for.