First season was fun fluff. Special episode was crap. Second season was mostly the latter with brief moments of the former. Zero rewatch value; I’ve already forgotten almost everything that happened. From what I know of the light novels, the problem was definitely not running out of content.
In unrelated news, I saw Logan over the weekend. Good use of the material, and some excellent performances, but I wonder how many people would want to see it more than once. Hugh Jackman and Dafne Keen must have had on-set therapists to keep their vocal cords from scarring; half their lines in the script must be [snarl], [growl], [howl], [grunt], [scream], [inarticulate rage].