Wow - my Y1 daughter gets seven reading books a week and a "free choice" book for us to read to her. More reluctant readers do get fewer, the teacher upped the volume once DD wrote a few notes to school (herself - not me!) saying "more books, please". I think everyone in the infants gets at least three.
My son (in the juniors) gets two books a week, but they are much longer (ORT level 15). He could change them as often as daily, if he wished, but can only discuss/change level once a week. They have silent reading of non-scheme books every day and they also like us to make a note on the non-school books they are reading in their reading record. e.g. he went up to level 15 after I noted that he was reading The Hobbit at home and they quizzed him on how he was finding it.
Both classes also visit the library and local book shop for stories and book recommendations and chats (actually the local book shop owner was more impressive than the librarians in terms of book knowledge). There are regular times when they bring in favourite books from home to chat about, author visits, parents going in with their favourites, display of student/staff favourites on the walls, breakfast reading sessions with parents, book fairs, etc, etc.
I think what you describe sounds uninspiring, especially the comprehension books. Do book-loving activities happen in school? What would happen if you were not from a home like your daughters where books are valued?