Eudial's death seems to reference the original anime in some ways: She is shown being hit by the attack from a rearview like many of the Daimons from Sailor Moon S; The Daimon Egg rising out and disappearing is similar to the Daimon Eggs coming out and vanishing in the original anime.
Originally, Eudial was field commander for many episodes before her demise halfway through the third season of Sailor Moon (1992). She was then replaced by Mimete. Also, Eudial perished in a car crash after Mimete cut the brakes of her vehicle in the original series.
In the original series, Hotaru did not appear until Mimete took charge of collecting Heart Crystals after Eudial's death.
Sailor Uranus never kissed Sailor Moon in the original series.
Eudial's demented face before being finished by Moon Spiral Heart Attack is very reminiscent of the monstrous faces many of the villains make before being destroyed in the manga.