I agree that was the low point of the fic... well, until this latest fiasco started as that was when he started slowing his releases by a lot.
However, there were a lot of interesting arcs after that... Tiamet and Gwenivere moving in... the vacation to an island, Tiamets new pet, the accountant getting stomped on, and living to tell the tale, the two girls from the history compilation committee repairing damage to Emiyas house and fixing the defenses, a trip to england, the hunting down of a rogue devil king and getting good blackmail material on him, and Gwenivere becoming his handmaiden.... curing of mother of Kaide, the culmination of Homuras plans, and we must not forget... Lancelot in a gaming/anime store....