The exchange between the two is amazing and I would have loved to see Krennic try to bring Galen to his side of thinking in a couple of flashback scenes. This also could have given the film more time to develop Galen as a character so that his death would be more impactful.
Definitely recommend Catalyst, Krennic is the best part of the book.
Never read a Star Wars novel, except 1/4 of Plaguies which I gave up on. But I might pick this up once it’s out in paperback.