At that point it was fixed that Mari would pilot Unit-02. However, Misato and Shinji's separation, what the course of action would be after the berserk of Unit-02 that Mari piloted, what happens after the angel consumes Unit-00 - these sorts of things were a long way from being settled. Mari's appearances, as well - in draft 13b, dated May 23rd, there was a scene where she had tea with Shinji on the roof of the school. For Part D, I focused on continually producing revisions from May to about September. There are 13 drafts just in the data that still remains. Really, it was like all sorts of ideas were coming up and then disappearing.