I've almost finished reading her book. It takes a couple of chapters to get into the good stuff, but it's still a pretty good read.
She basically describes him as OCD, and obviously driven by money. Both of which offer a little insight into why he's obsessed with controlling every aspect of his contracts, and also why he's so obsessed with being undefeated. I'm sure a lot of it is because he's a power tripping asshole, but still just another way to look at it.