I prefer the worldbuilding and general premise of this trilogy over the sequels we got, by a large margin. However, bringing Maul back would have been a big mistake and would’ve been very confusing for people who are only familiar with the movies. He’d been absent since Episode I, as far as most people are concerned. Him showing up again, and audiences having to watch an animated series to fill in the gap, would be very off-putting for people.
In a way, I’m glad George’s sequel trilogy didn’t get made, since if it was written and created by the man himself, it would be harder to disregard. And he didn’t seem to have a firm idea of what he even wanted the sequels to be (though neither did Disney and Lucasfilm, to be fair). I think a sequel trilogy was something George would toy with and write notes on every few years, but I doubt he ever would have gone through with it, since he’s getting up there in years, wants to spend time with his family, and ultimately, he had more of a story to tell going backwards in time than forwards.
It reminds me of how J.R.R. Tolkien actually started writing a sequel to Lord of the Rings. He wrote the first couple chapters, then scrapped the project when he realized
a) It was depressing and ruined the bittersweet ending he had created
b) It wouldn’t contribute anything substantial or insightful to the Middle-earth mythology. The story was complete. Anything post-LotR would have been anti-climactic.
I think, on some level, George knew his sequel trilogy was never going to happen by his own hand. It was all just ideas and notes. But he did certainly feel blindsided when he realized Disney wasn’t using his treatments (whatever those treatments entailed). Bob Iger himself made that clear, and I’m sure he softened George’s reaction when he described it. I imagine George was fuming. The fact is, Disney didn’t want to spend any time pondering or formulating what their sequel trilogy was going to be. They wanted to push it out as quickly as possible. It was never about the story to them.