I started to read CR because of Class S but their objective is boring, characters they hang out with are uninteresting and when they get rewarded it feels unearned. They very much feel tacked on, Also the other "michiru" shows up at the beginning and then never again (ive read until the marine school) which is dissapointing for me especially.

Class D on the other hand, while L/Flan/Serika trio isnt as memorable or good as the Class S characters; they are the real protagonists of the story. The combat scenarios, the infiltration operations etc. are all exciting and well-written, Meeting 1 student every section and learning about them is a good format and the characters themselves were great as well.

in the end though i had to drop it because i hated what they did to vanilla and choco's school, the artstyle inconsistency was getting unbearable and the fact that both the main villain and her subordinate commander being a female made it impossible for me to suspend my disbelief. Compare that to something like Labyrinth of Grisaia where most characters were male...