Indeed, The Expanse actually has deviated a bit from the novels, mostly at introducing characters on the show at a much earlier point than when they were introduced in the novels. Though they have also introduced characters original to the show who weren't in the novels, included subplots to the show which weren't in the novels and even killed off a character in the show who's still alive in the novels, though in that case that was done because the actor had to be fired from the show. Regardless, fans of The Expanse novels have reacted positively and embraced these changes. Whereas Star Trek fans are likely to react with murderous rage if anything in Star Trek gets changed and being preaching Gene's Vision or begging Gene have mercy.