Sailor Haumea: For some reason, the definitive draft of this ep (the last draft before the storyboard phase) explicitly has Rei I survive Naoko strangling her and depicts her as waking up after Naoko's suicide and looking around before leaving the room. The footnotes for the script (as printed in Evangelion Original) state that this part was removed on Gainax's request, but the fact that Rei I was originally intended to not die in this scene is very odd and raises more questions than answers, honestly.
UrsusArctos: The scene description was translated by the legendary Bochan_bird and the footnote's existence was confirmed by EML stalwart Seventh Messenger, so there's no doubt this is accurate. Hot damn, I wish we had someone to translate Original in full! Why did they want Rei I to survive at first, and who in Gainax chose to reverse it? All mysterious, and all so very interesting!