I really did like that after 15 volumes of Touma magic and science mishaps kamachi decided to try using a entirely new set of characters, structure, ideas and tone.
Not many writers are bold enough to just go that far out of the established formula/comfort zone and make it work but given all the retroactive continuity and cross media this has become a pretty big event for many characters Involved that still has ramifications pretty late into NT.
Revisiting this event and getting more details is very appreciated.