Just watched it, great documentary. I wish there was more like it, as too many seem to distort and idealize what happened. By the halfway point, Roger Allers was breaking my heart. What he went through is one of my worst nightmares. I actually liked the character designs in his version a lot and would love to see more. At this point, I really can't judge his version beyond that as it's not available to view.
Watching The Sweatbox, it actually makes me want to see other documentaries on similar troubled projects like Ratatouille, Shrek and Cool World. I know there's one being made about The Thief and the Cobbler.
Actually, I immediately thought of American Dog.
The parallels to this are huge and I'd love to see an honest look at what happened. Unfortunately, Sanders isn't under the best of terms with Disney because of it.