[TheRaizin]

I woke up and there is new info again.

-There was an idea where someone else was supposed to pick up Espada and Kento would stay as Calibur. If it were to be kept, it would have been an entirely new character. It was scrapped since they wanted the main three reunited.
-There were complaints heard that Sophia did not do much in the show. Chinen-san had musicals conflicting with the show, so they had to accommodate that. She was satisfied with her ending becoming Calibur, and everyone seems to be OK with that.
-There was no intention to age up Luna. She's supposed to represent the childish wonder in everyone, but SHS casted an adult version of her, so the change was decided. Luna is still the childish wonder, but now you have to mature still. There was an ending considered for Saber where young Touma and young Luna were going to have a second chance at childhood in Wonder World.
-A lot of characters were planned to die in the show, but because of the current state of things, they wanted to keep it light hearted. Everyone lives! The cast knows who of which were to die but surprise they didn't in the end. Maybe one day that change however...