The Great Sacrilege does not specifically discuss the reduction in the number of signs of the cross in the Novus Ordo, nor does the book specifically discuss the reduction in the number of genuflections.
These changes may or may not be, by their nature, sacrileges. After all, the sign of the cross is still used and the priest does still genuflect. Had the Mass originally contained the numbers of these actions we find in the Novus Ordo there would have been nothing to question.
The sacrilege is in in reason these changes were made and the way the entire Novus Ordo has been designed to diminish the sacred, reverence for God, respect for the priest, etc., etc., etc. The sacrilege is also in making the very changes enacted by the Protestant revolutionaries who did so for a variety of very specific theological reasons and pretending that those theological reasons don't exist or, even worse, parroting those reasons while also claiming that nothing has changed in the theology.