Rereading this series as an adult, it has been fun to see how the larger pieces of the series begin in the earlier books. Harry's frustration with the adults in his life for not including him in the conversation about his safety becomes a larger plot point in book 5, but you can see the beginnings of it in this book, particularly in the early chapters where Fudge and Mr. and Mrs. Weasley are reluctant to share with Harry that Sirius Black is after him.
Knowing the "twist" with Hermione ahead of time makes it easier to pick up on the clues about her stress and emotional fatigue from all the classes she is taking.
However, I think a lot about how scheduling works at Hogwarts. Having only one teacher for each subject is a brutal class load for an instructor, even if they are only teaching 1 class at each level per week. Small class sizes would help a lot (approx. 10 students per house per year with some classes being "doubled" with another house), but I can't imagine having to prep for 7 classes, even with magic to help. Even if they only teach one class to each year a week, there are still 4 houses! 4 houses times 7 years means 28 individual classes a week, which makes me stressed out on behalf of the Hogwarts professors. I hope they have a union.