The writers' job on a movie like that is putting down on paper what the directors, producers and stars (in this order) tell him to do.
Spiner did recommend Logan to Berman to write Nemesis and he did request that Data be killed off. This much is true. However, legend has it that Logan was given complete control of the script and screenplay by Berman. Apparently, Nick Meyer had been approached to direct Nemesis and wanted to re-write the script. Because of this, Meyer declined. Admittedly, I don't know how true this tale is. Normally, I would wonder why Meyer would want to be involved, but I do recall hearing his name around the time Nemesis was in pre-production and that he was involved in the first season of Discovery suggests to be its not beyond him to do so. But, who really knows?