It's what they probably should have done from day one.
I'm not saying the Thrawn trilogy is like the highest art ever made. It's glorious pop schlock fun, as Star Wars should be. But it reminds me of the way that manga is so often treated as storyboards for the anime adaptations. The books, being books, can't be quite so directly translated, but it's close enough that it shouldn't strain any competent scriptwriter. Assuming Disney still knows how to find such people, a proposition not well supported by recent evidence.
Also, automatic three-movie plan, which could be used to fix up one of Hollywood's biggest problems. I don't know where Hollywood gets its swaggering confidence that they can make multi-movie epics while simultaneously having no plans whatsoever for what the next movie will be, after their repeated, catastrophic, and expensive failures trying to create them. What if, and hear me out here, try not to let your head explode at the audacity of this idea, they didn't try to spend billions of dollars just sort of "winging" it? What if they had an actual plan for how they were going to spend billions of dollars over the course of a decade? I know, I know, it's a crazy idea, but maybe they should give it a try.