This Light Novel needs to be seperated in Volume 1-12 and 13+.
The First part followed always the same structure: Easygoing interactions (10%), fixing a problem of a comrade(40%), dealing with the Main issue of the Volume (40%), Easygoing interaction to reflect the outcome of what happened (10%). The formular worked. Weakness in the first part was mainly the Ship of the Author which was continuesly rubbed into the face of the Reader and that the social interactions became very repeative and a few other bad writing issues. It was able to make up for this weakness by introducing us into a very interesting world.
With Volume 13 and after it changed though. The Author couldn't handle the numerous characters anymore so he only focused on the same 4 characters for the easygoing part (which became smaller), disregarding everyone else, even the main heroine. He mixed the 1 Character with issues and the Main issue of a volume into one major part, which reduced the the diversification, and most importantly the reflection part was altered into a forshading part for the next Volume. Why is it the most important change? Because we do not receive feedback from the interesting world or the characters. It stales the development and makes the world lifeless which was previously so colourful.
The Author did not stop going into the wrong direction
With the latest events he basically destroyed the interesting world as most of the Characters which represented it got sealed, the rating game was destroyed, and the social life has been on hold for several Volumes. (besides his own ship of course)
With every positive point gone from the first half (Volume 1-12) which got one into this series, there really is no reason to continue reading from Volume13+.
First half gets a 8/10 because I enjoyed the setting of the world, rating games, the ridiculous humore and the interactions that I could live with the bad writing in it.
Second half gets a 4/10. Writing was slightly improved but all the good points of first half are gone.