Kayle/Morgana, who is the writer?

I want to start off by saying that I felt that the transition of Kayle/Morgana's story was handled quite well in all honesty. The dichotomy of the sisters was left in tact, their grey/ambiguous nature was left in tact, one defended freedom, while one defended the rules of society. I think the split perspective and the nuance that changes between each story-telling was particularly well done. It is incredibly hard to write the same story, from two different perspectives, when the only differing factor between the perspectives is an ideological split.

With all this being said, I would be enthralled to pick the brain of the individual who was responsible for writing these characters back into modernity. Especially because I draw issue with the seemingly shoe-horning-in of the sisters into Mount Targon and Demacia. I'll be honest, the open-nature of their previous lore obviously needed some tie-in to Runeterra, but I think the choice to start them as born-to-a-human-mother twins, requires a little bit of defense. As far as I can tell this was an arbitrary decision to push them into ties with celestial beings that VAGUELY tie into the current landscape of the world that is being built.

I understand this may not be the most engaging of discussions just off the premise, but I would be interested in hearing the argument as to why the sisters needed to be tied in to the world, in THIS particular fashion.

Kindly, A Die-hard Morgana fan.