> Other than turning Paul into a crusader
Are you referring to Paul's visions of future jihad? That is definitely in the novel. Paul takes advantage of the Fremen seeing him as their Mahdi, and uses their zeal to fight the Harkonnen, avenge his family, and win control of the Imperium, all the while having visions of a future bloody galactic-scale jihad, which he struggles with, ultimately causing him to leave The Path, and in the sequel, become The Preacher.
The 2022 screenplay is more or less identical to the 1984 screenplay, scene for scene, except for giving Duncan Idaho his due, at which the 1984 film notably failed. They did not reinvent the wheel here, and I don't blame them. It would be a daunting task.