Aya’s so-called change was to break Bedivere’s repression on Dragon blood.
Most of the methods he issued were simplified and degraded versions of the original. The difference was then simply filled in by Aya.
As the former Bretton Dragon Clan King, Aya’s understanding of Dragon bloodline was far above the others, and thus, it was very easy for her to fix these ancient methods. Therefore, for the next month, she took the opportunity to communicate with the other Dragon bloodline to spot and make them aware of the flaws in their methods, and then complemented them.
This process wasn’t too clearly done, but the effect was quickly manifested.