The problem is, this season is more reliant on the light novel to tell the story than the previous two seasons. The first season is definitely self-sufficient and requires no additional input from anywhere (and the story took its time to develop, cutting out those parts of the novel that actually could be ignored), and I believe that the second season is similar in this regard. The third season is bad for those who've read the novels up to the latest one (with Mathers and Scotland), because it doesn't live up to the hype exactly. You were expecting an epic Terra fight - nope, here's a sad excuse for it. Epic Kakine-Accelerator battle - nope, here's some poorly animated crap. (animation quality got worse, btw) And it is also bad for those who have no clue about the novels, because nothing is explained properly. The whole Battle Royale arc feels like fanservice, not a truly polished story worth animating. Who are these characters, what are these groups, why are they fighting — the author of the novel actually takes his time to explain that, but we can't have this on-screen, I guess. TL;DR It's only possible to get into this season if you've read the original novel, but then you'll be disappointed by the shoddy execution and the overall drop in quality — the episodes are so rushed just to appease those who want to see the WWIII arc ASAP, probably?